CLASSES OF COMPETITION AND TECHNICAL GUIDELINES

INDEX OF CLASSES

4.1 GENERAL

4.2 PROFESSIONAL CLASSES
4.2.1 Top Fuel
4.2.2 Funnybike
4.2.3 Pro Modified
4.2.4 Pro Stock
4.2.5 Pro Street

4.3 SPORTSMAN CLASSES
4.3.1 Super Street (semi-pro)
4.3.2 Real Street
4.3.3 SuperSport (semi-pro)
4.3.4 Top Gas
4.3.5 Super Comp
4.3.6 Street Fighter

4.4 E.T. HANDICAP CLASSES
4.4.1 Pro E.T
4.4.2 Street E.T
4.4.3 Super Eliminator

AMA Dragbike competition is organized into four categories: Professional, Sportsman, Handicap and Exhibition. Each category is further divided into classes that describe the technical characteristics of the bikes competing in those classes. The Professional Category consists of Top Fuel, Funnybike, Pro Mod, and Pro Street classes. The Sportsman category includes Super Street, Real Street, SuperSport, and the index classes: Top Gas, Super Comp and Street Fighter. Handicap consists of Pro ET and Street ET. Exhibition classes consist of Super Eliminator. Classes listed are not guaranteed to be conducted at any or all National eve

TF Champion - Larry McBride

Funnybike Champion - Keith Lynn
 

4.2.2.1 ENGINE

4.2.2.1.1 *ENGINE
Stock cases permitted; aftermarket cases are highly recommended. Any V-twin engine using nitromethane fuel engine must utilize cylinder head restraints. (See Cylinder Head Restraints, 2.1.3.1) Accepted aftermarket cases, cylinder heads, planetary transmission permitted. (See Oil Blanket 2.1.5) All Gas/Nitrous entries must run multiple stages of nitrous.

4.2.2.1.2 V-TWINS
MAXIMUM DISPLACEMENT: 200 cubic inches.

4.2.2.3 BRAKES & SUSPENSION

4.2.2.3.1 BRAKES
MINIMUM SIZES: Front: dual, 9-inch diameter x 1/8-inch width; single, 11 1/2-inch diameter x 3/16-inch width. Rear; single, 10-inch diameter x 3/16-inch width. All brake lines are to be steel braided. 70” wheelbase same as Pro Stock.

4.2.2.4 FRAME

4.2.2.4.1 *FRAME
Wheelbase minimum is 70-inches. Stock cradles (chassis) prohibited. Minimum seat height (with rider in position and seat compressed) measured from lowest point of seating position to ground, 16-inches. (See Frame Construction, 2.4.2)

4.2.2.5 TIRES & WHEELS

4.2.2.5.1 *TIRES
Minimum rear tire size width is 10-inches; Maximum tire width is 14-inches.

4.2.2.5.2 WHEELS
Front wheel must be minimum 16-inch diameter. All rear wheels must have a 3/8-inch minimum thickness spider and bead locks.

4.2.2.6 FUEL

4.2.2.6.1 FUEL SHUT-OFF
All nitro methane fueled entries must have a pre-loaded fuel shut-off. A lanyard must be connected between the rider and the trigger; the shut-off may be operated by spring, air, hydraulic or other means accepted by Tech. All entries must have a means of shutting off fuel while the rider is on bike.

4.2.2.6.2 FUEL SYSTEMS
Steel braided fuel lines are mandatory on all pump driven fuel systems. Dual cable positive return throttle is mandatory. All non-braided fuel lines must be fastened with a metal clamp, band or fitting (no wire). Be careful not to over tighten. All nitrous only bikes must utilize a “backfire strap.”

4.2.2.7 BODY

4.2.2.7.1 BODY
All FB rear fenders must extend past the rear axle. Front fairings must have transparent windscreens. All 4-cylinder Funnybikes must run a tank shell similar to stock with engine manufacturer’s logo in large letters. Front fender, rear fender, headlight or fairing mandatory.

4.2.2.8 ELECTRICAL/CONTROL

4.2.2.8.1 KILL SWITCH
When the lanyard is pulled, ignition, fuel pump and nitrous solenoids must be disarmed. Must have on/off switch on handlebar within thumb reach without removing hand from grip. (See Ignition Shutoff, 2.8.5) When the lanyard is pulled, ignition, fuel pump and nitrous solenoids must be disarmed. (See Ignition Shutoff 2.8.5)

4.2.2.9 SUPPORT GROUP

4.2.2.9.1 WEIGHT
650 lbs minimum weight. Weights or nitro percentage may be adjusted race by race based on individual performances.

4.2.2.10 RIDER

4.2.2.10.1 PROTECTIVE CLOTHING
Nomex underclothing protecting legs is mandatory. Nitro entries must utilize a Nomex helmet sock.

4.2.2.10.2 QUALIFYING
Riders of Funnybike must hold a AMA Dragbike Class 1 license. (See Licensing, 3.11.2)
 

Pro Mod Champion - Jack Young.
 

4.2.3 *PRO MODIFIED CLASS REQUIREMENTS

DESIGNATION: PM, followed by rider number.

Reserved for single and double-engine motorcycles. Pro Mod is run "heads up" with a qualified field up to 16 motorcycles.

4.2.3.1 ENGINE

4.2.3.1.1 ENGINE
CC limit based on weight or individual class specifications. (see Weight 4.2.3.9.1) Accepted aftermarket cases permitted using original crankshaft design (i.e., roller bearing or plain bearing). Original cylinder head design must be used. Cases must fit in stock engine location. Aftermarket cylinder heads permitted with prior approval and consent of the AMA Dragbike Technical Department (See Cylinder Heads, 2.1.3) All nitrous bikes must utilize a "backfire strap." Header must be bolted or welded to collector. Exhaust header restraint mandatory. (See Oil Blanket 2.1.5)

SUB-CLASSES DESIGNATION
4.2.3.1.2 F/IN: Factory Experimental, Injected Nitro
Injected nitro, no boost, no nitrous. 1500cc maximum displacement. Maximum 13" slick. (See Nitro, 2.6.4)

4.2.3.1.3 F/N: Factory Experimental, Nitrous
Single engine, Inline or V-Twin. Carburetors or fuel injection with approved gasoline only. Single stage of nitrous only. Maximum 11" slick. (see Weight 4.2.3.9.1)

4.2.3.8 ELECTRICAL/CONTROL

4.2.3.8.1 KILL SWITCH *
When the lanyard is pulled, ignition, fuel pump and nitrous solenoids must be disarmed. Must have on/off switch on handlebar within thumb reach without removing hand from grip. (See Ignition Shutoff, 2.8.5)

4.2.3.9 SUPPORT GROUP

4.2.3.9.1 WEIGHT *
Minimum weight at conclusion of run including rider:

Pro Stock Competitor - Chad Otts
 

4.2.4 *PRO STOCK CLASS REQUIREMENTS

DESIGNATION: PS, followed by rider number.

Pro Street Champion - Mike Slowe
 

4.2.5 *PRO STREET CLASS REQUIREMENTS

DESIGNATION: PST, followed by rider number.

This class contests the ultimate in street-legal motorcycles. Created to legitimize illicit street racing, Pro Street is reserved for stock-appearing motorcycles with unlimited engine modifications.

In addition, any approved motorcycles originally produced as 1000cc displacement sport bikes will be allowed to compete, with multiple power-adders. This designation is intended to entice the use of the highly popular current class of late-model liter bikes. Only the latest lightweight, high-tech import offerings, with a maximum production size of 1000cc, will be allowed to race under this designation, and each model must be approved for use by AMA Dragbike. Currently, the following 2001 or newer models are approved for use:

HONDA: CBR 929RR, CBR 954RR, and CBR 1000RR.
KAWASAKI : ZX-9 and ZX-10
SUZUKI: GSXR1000
YAMAHA: YZF-R1

In addition, expanded allowances for V-Twin entrants, including the use of multiple power-adders, will allow the competitive use of both import and domestic V-Twins.

All bikes must be street legal with VIN tag, self-starting with motorcycle engines only. Pro Street is run “heads up, no breakout” with a qualified field up to 16 motorcycles on a (.400) Pro tree. Separate records will be allowed as follows: Turbo, Nitrous, All-motor and V-Twin.

4.2.5.1 *ENGINE

4.2.5.1.1 ENGINE
Production-based motorcycle engines allowed, with any internal modifications permitted. Nitrous oxide may not be used in conjunction with any turbocharged entrants, with the exception of draw through carbureted turbo, V-Twins, or production-1000cc entries. Air or electric shifters permitted. All engines must be self-starting and utilize OEM-style starting systems. No push or roller starts. V-TWINS: Non-production engines may be approved for use in this class, but their concept and design must be approved prior to any construction.

DISPLACEMENT:

4.2.5.1.2 TURBOCHARGERS

TURBOCHARGING: Limited to one turbo with a maximum turbo inlet opening of 62.5mm. AMA Dragbike defines maximum turbo size as the maximum allowable diameter of the inlet housing at the point where the leading edge of the compressor wheel meets the inlet housing. All air entering the turbo must pass through this opening. No stepped inducer wheels permitted, the contour from the inducer to the exducer must be continuous with no steps. The leading edge of inducer wheel may not exceed 62.5mm, and must fit inside the 62.5mm area of the inlet housing. The use of restrictor plates or stepped inlet housings in an effort to limit compressors with inducers larger than 62.5mm is not acceptable.

INLET COOLING: Any type of inter-cooling permissible. Turbocharged entrants that are prohibited from the use of nitrous may not use nitrous as cryogenic cooling source.

Entrants utilizing water injection must have the water tank mounted in a manner to allow tech to easily inspect its contents. Absolutely no substance other than water is allowed to be in the tank.

4.2.5.1.3 SUPERCHARGERS
Any style engine-driven supercharger is allowed.

4.2.5.2 DRIVETRAIN

4.2.5.2.1 CLUTCH
All clutch systems must be approved by AMA Dragbike Tech for use in this class. Each interested manufacturer or team must submit sample parts for approval a minimum of 60-days prior to any event in which it desires approval eligibility. No pneumatic, electric, or hydraulic clutch engagement or activation systems are allowed.

TURBOCHARGED & SUPERCHARGED 4-CYLINDERS: Slider clutches prohibited. Clutch engagement and disengagement must be controlled by conventional cable or hydraulic-actuated clutch lever. Minimum 80 lbs of static spring pressure at installed height required. Engine RPM must decrease with the release of clutch lever at 1200 RPM.

V-TWINS & NON-TURBOCHARGED 4-CYLINDERS: Any approved clutch system allowed.

4.2.5.2.2 TRANSMISSION
All entrants must utilize an OEM-style shift drum and transmission.

TURBOCHARGED & SUPERCHARGED 4-CYLINDERS: Automatic transmissions prohibited. (See Transmission 2.2.3) No transmission which could allow override-style shifting is allowed. No components may be used that are designed to allow the transmission to be simultaneously engaged in more than one gear. This includes, but not exclusive to, windowed shift drums, split forks, split gears, split fork slider rings, gear or fork detent springs, etc.

NON-TURBOCHARGED 4-CYLINDERS & V-TWINS: Automatic transmissions allowed.

4.2.5.3 BRAKES & SUSPENSION

4.2.5.3.1 FRONT SUSPENSION
The use of retention straps prohibited. See Front Suspension (2.3.2) for rules concerning travel and spring requirements.

4.2.5.3.1.1 TRIPLE CLAMPS

The steering stem offset on top and bottom triple clamps must be equal. Front axle offset may not be less than 1/2-inches. (See illustration Above) The use of triple clamps, steering stems, stem bearings, offset bearing races, or any other components designed to increase or decrease the rake is prohibited. Axle must be in the center of the forks. Triple clamps can be made of heavy material only after AMA Dragbike approval of concept. Bottom of lower triple tree cannot be higher (must be flush or lower) than webbing of lower steering neck.

4.2.5.4 FRAME

4.2.5.4.1 *FRAME
Stock OEM frames required. No modifications to any portion of frame allowed, unless specifically noted.

ALLOWABLE MODIFICATIONS:

ALL BIKES: Frames may be polished, chromed, painted, powder coated, or otherwise cosmetically altered, as long as such modifications do not remove substantial material or weaken the frame. No braces, gussets, or crossbars may be removed, unless specifically listed. Additional braces, gussets, or crossbars may be added, as long as they do not weaken the frame in any manner.

Small accessory brackets, tabs, mounts, etc., using fasteners no larger than 5/16”(8mm) may be removed, relocated, or modified. New accessory mounts may be installed, and new mounting holes may be drilled into the frame, as long as the hole size does not exceed 5/16” (8mm). An excessive number of mounting holes will be considered lightening of the frame, and is not allowed. Exhaust mounting brackets, center-stand, and side-stand brackets, regardless of fastener size, may be removed as long as doing so does not weaken the frame.

On turbocharged entrants, steering heads must remain stock, with the exception of the lower steering stem bearing race area. The bottom of the steering head may be remachined or removed and replaced in order to increase the clearance between the front tire and the bottom triple clamp, a technique commonly referred to as “short necking”.If short-necking has been performed,the new bearing race cup must use the factory bearing race, and may not be located more than 1.00 inches above the original bottom webbing of the steering neck. The replaced or modified bearing race cup must be located along the same axis as the original location, i.e., the rake of the steering stem may not be altered during this modification. No other material beyond that reasonably necessary to perform the short-neck modification may be removed from the steering neck casting, with the exception of removal or modification of the steering stops and/or the headlight/fairing mount. For non-turbocharged entrants, frames may be altered in order to increase the rake. No de-raking of frames will be allowed. Location of bottom triple clamp must be in the same general location as the legal modifications allowed for turbocharged entrants.

Seat rails/sub-frames may be modified or relocated. Mounting tabs or brackets for these items may be modified or relocated as well.

Rear suspension mounts including shock mount and rising rate linkage mounts may be relocated. However, due to the extreme loads and potential safety issues, modifications to these components will be heavily scrutinized.

On turbocharged entrants, swingarm pivot mounts may not be modified. Swingarm pivot centerline cannot be moved in any manner, including offset bushings, plates, etc. Proper design, welding, and bracing are crucial in these areas. Non-turbocharged entrants are allowed to relocate the swingarm pivot axle up to 2” from its factory location. Engine mounting tabs and brackets may not be modified. Bolt-on engine mounts may be replaced, but must maintain the same mounting dimensions as the factory mounts. Engine relocation in any manner is not allowed.

HONDA BLACKBIRD: The round tubular cross-brace, located directly behind the steering stem, may be removed. Upper rear sub-frame mount may be removed. It may be cut off flush with the top of the factory frame spar, but no farther.

KAWASAKI ZX-12, ZX-14: Airbox inlets may be welded shut, or modified for better sealing with turbo dump pipe, as long as these openings are not enlarged. Access panels for throttle body/airbox connectors may be modified, as well as the mounting area for the connectors. These modifications may not weaken the frame. Opening for turbo pop-off valve may be cut in airbox area of frame as needed, as well as mounts or bungs for air sensors.

SUZUKI GSXR (EARLY MODELS): 1986-1987 750 and 1986-1988 1100 models may remove the square tubular cross-brace located generally above the carburetors.

Late-model liquid-cooled models, factory-equipped with engine mounts connecting between the cylinder head and the upper frame spar, are not required to use these mounts. The mounting tabs for these mounts may be removed from the frame.

SUZUKI HAYABUSA: The round tubular cross-brace, located directly behind the steering stem, may be removed. Upper rear sub-frame mount may be removed. It may be cut off flush with the top of the factory frame spar, but no farther.

SUZUKI GS & KAWASAKI KZ/Z1: Frames may be modified for a backbone fuel cell. Backbone cell may not be used to hold any fuel or other liquids.

V-TWINS: Aftermarket frames may be approved for use in this class, but their concept, appearance, and design must be approved prior to any construction.

4.2.5.4.2 GROUND CLEARANCE
TURBOCHARGED 4-CYLINDERS and SUPERCHARGERS: Minimum 3” with rider sitting on bike, straight up perpendicular to ground with 8 psi in rear tire.

ALL MOTOR / NITROUS-ONLY 4-CYLINDERS / V-TWINS: Minimum 2” with rider sitting on bike, straight up perpendicular to ground with 8 psi in rear tire.

4.2.5.4.3 SEAT
Minimum seat height, with rider in position, seat compressed and 8 psi in rear tire, measured from lowest point of seating position to ground is 22-inches.

4.2.5.4.4 WHEELBASE
TURBOCHARGED 4-CYLINDERS and SUPERCHARGERS: Maximum wheelbase 68 inches.
ALL MOTOR / NITROUS-ONLY 4-CYLINDERS / V-TWINS: Maximum wheelbase 70 inches.

4.2.5.5 TIRES & WHEELS

4.2.5.5.1 TIRES
DOT motorcycle street tires only, slicks prohibited. Tech must be informed prior to tire change for verification. (See Tires 2.5.1)

4.2.5.5.2 WHEELS
Cast wheels must have a 180mm or greater width tire. Wheels 6.75 inches must have bead-lock unless utilizing Mickey Thompson MCR2 or AMA Dragbike approved tire. Bead-lock highly recommended on all rear wheels. 16-inch minimum diameter front wheel. Total weight of front wheel rotating assembly, including tire, rotor, bearings, etc cannot exceed 29 lbs.

4.2.5.6 FUEL

4.2.5.6.1 *FUEL
TURBOCHARGED 4-CYLINDERS: Any AMA Dragbike-approved gasoline.
NITROUS-ONLY 4- CYLINDERS and V-TWINS: Any AMA Dragbike-approved gasoline or alcohol may be used.

SUPERCHARGERS: Any AMA Dragbike-approved gasoline or alcohol may be used with a crank driven supercharger. (See Fuels 2.6.1)

4.2.5.7 BODY

4.2.5.7.1 BODY
All main body parts, including tail sections and seat, must have stock appearance and shape, (i.e., no one piece bodies or tank shell, unless originally equipped). Tail section or rear fender must extend past the rear axle. Alterations of gas tanks are limited to sloping at rear of tank; brand name must appear on both sides of bike. Replacement parts are permitted, but must retain the shape of the stock parts they replace. Altering of stock body shapes must be approved by AMA Dragbike. (See Body, 2.7: 1 & 2). To allow access to nitrous bottle, all nitrous bikes must have thumb (butterfly) body fasteners on any aftermarket body pieces that cover bottle to allow removal of panel or section by hand without the use of tools.

FUEL TANKS: Aftermarket fuel tanks are limited to AMA Dragbike approved manufacturer and part numbers only. In order for a tank to be legal, it must be commercially available, at a fair market price, to anyone desiring to purchase one. Manufacturer or distributor must be able to maintain availability at all times, and must be able to make delivery within 30 days of order. Manufacturer or distributor has the right to demand full pre-payment, including any shipping charges, before considering an order to be completed.

CURRENTLY APPROVED AFTERMARKET TANKS:

Catalyst Racing Composites :

• BUSOTK99
• BUPSTK99
• ZX14PSTK06
• GSXR1GTK07

Velocity Racing

• Pro Street Tank

ALCOHOL TANKS: Due to fuel incompatibility problems with alcohol, any entrant using alcohol as a fuel may use a fuel tank with an aluminum or steel inner structure as a fuel holding tank. Tanks must have an accessible fuel filler cap in a similar location to the approved tanks. The outer shell of the tank must be identical in shape and appearance to the currently approved fuel tanks. Companies manufacturing approved tanks must also be able to deliver the outer tank shell within 60 days of completion of order placement, at fair market price, to any competitor desiring to construct such a tank. Part numbers will need to be determined and submitted to AMA Dragbike at that time.

Companies desiring to produce production tanks for this application may submit tank designs for approval. Individual competitors may construct their own tanks using an approved outer shell, but design must be approved by AMA Tech prior to use. For further questions or inquiries, contact AMA Dragbike technical department.

TAIL SECTIONS: Seat location will be determined by a minimum distance of 29.5-inches measured from the centerline of the steering stem to the back of the seat, including padding, at the bottom most point measured at a 90 degree angle to the ground. Approval of all parts will be limited to 30-days prior to an event. Photos of parts installed on the exact bike must be submitted for approval.

4.2.5.8 ELECTRICAL/CONTROL

4.2.5.8.1 ELECTRICAL
Functional charging system, head and taillight w/ brake light, and kill switch required. Headlight and taillight must be retained in stock locations and operate automatically when ignition is switched to the ON position. Turn indicators optional. Headlight is required to be on during all qualifying and eliminations. In the event of failure, charging system and bulbs will be inspected and repairs will have to be completed prior to next round. Auto shifters are prohibited. Two-steps are prohibited on turbo entrants but permissible with nitrous entries.

HEADLIGHTS: Factory headlight systems must be used. The complete lighting system, including lens, housing, reflectors, bulbs, etc. must be intact. Mounts may be modified or removed. Bottom of headlight housing may be modified for greater front tire and/or fender clearance, but housing must remain enclosed to prevent the escape of light from under the fairing. Headlight must be mounted in the front fairing in the factory location. Non-fairing bikes must have headlight mounted in factory location. During competition, all bulbs normally operating during the factory low-beam setting must be burning at all times. High-beam setting need not be functional.

TAILLIGHTS: All entrants must have a functioning taillight system, with operational tail and brake lights. Factory taillights are highly recommended. Non-factory tail lights must emit red light, and must be sufficiently bright to be reasonably visible.

4.2.5.9 SUPPORT GROUP

4.2.5.9.1 *WEIGHT
All weights include both the bike and rider, and will be taken at the conclusion of the run.

TURBOCHARGED & SUPERCHARGED 4-CYLINDERS: Minimum weight 685 lbs.
PRODUCTION 1000cc 4-CYLINDERS: Minimum weight 580 lbs.
V-TWINS & NON-TURBO 4-CYLINDERS: No minimum weight.

4.2.5.10 RIDER

4.2.5.10.1 QUALIFYING
Riders of Pro Street must hold an AMA Dragbike Class 2C license. (See Licensing, 3.11.2)

The following sportsman classes are contested at all AMA Dragbike National Events. These classes are run “heads up” with a qualified field of up to 64 motorcycles in single class eliminators. All are (.400) Pro tree classes. Points will be awarded towards a championship in each class. Records will be posted in Super Street and SuperSport. (See Section 5). All Sportsman Winners and Runner-ups must stop at scales for inspection.

Super Street Champion - Nick Mazeika
 

4.3.1 *SUPER STREET CLASS REQUIREMENTS

DESIGNATION: SST, followed by rider number.

Super Street is a class reserved for stock-appearing motorcycles with unlimited engine modifications and any approved gasoline, no nitro. This is the budget class for those not quite ready for Pro Street , but heavily armed with an extended swingarm, engine modifications and power adders. Super Street will be featured at all events.

All bikes must be street legal with VIN tag and current license plate visible from rear, self-starting with motorcycle engines only. Super Street is run “heads up, no breakout” with a qualified field up to 64 motorcycles on a (.400) Pro tree.

Each bike may be required to complete a 10-mile road course to prove street ability at selected events. ( See Pro Street 4.2.5)

4.3.1.1 ENGINE

4.3.1.1.1 GENERAL ENGINE
Any internal modification is permitted, with a maximum of one power adder. Air or electric shifters permitted. All engines must be self-starting and utilize stock-style starter systems. No push or roller starts.

OIL SYSTEMS: The use of aftermarket oil pans is permissible. The minimum pan height for all models of bikes is 1.00”, measured at the center of the pan, unless otherwise noted. The use of dry sumps is allowed, but dry sump oil pans must still meet the minimum height requirements. Any entrant utilizing a dry sump system must have any lower oil pan/crankcase scavenge lines connected to the oil pan. Scavenge lines may not be plumbed directly into the engine cases.

4.3.1.1.2 TURBOCHARGING
Limited to one turbo with a maximum turbo inlet opening of 54mm. AMA Dragbike defines maximum turbo size as the maximum allowable diameter of the inlet housing at the point where the leading edge of the compressor wheel meets the inlet housing. All air entering the turbo must pass through this opening. No stepped inducer wheels allowed, the contour from the inducer to the exducer must be continuous with no steps. The leading edge of inducer wheel may not exceed 54mm, and must fit inside the 54mm area of the inlet housing. The use of restrictor plates or stepped inlet housings in an effort to limit compressors with inducers larger than 54mm is not acceptable. Water injection and intercoolers are prohibited. The use of nitrous oxide or other cryogenic fluids as a cooling method is prohibited.

Boost controllers are limited to electronically-controlled 2-stage units. Initial boost level must be controlled by the waste gate spring only, no pneumatic or other external assist is allowed. Boost controller is allowed to have one ramp function to progressively increase boost level across a pre-set amount of time.  Ramp function must end at final boost level, an additional jump of boost level at the end of the ramp timer is not allowed. The beginning of the boost control function may be activated by any combination of a clutch activation switch, a rider-activated switch, a shift counter, or a delay timer.

Boost Stages: A stage of boost is defined as a single time-constrained function of boost management. For example: Suppose a bike has an initial boost level of 8lbs for 2 seconds, then jumps to 12 lbs for 3 seconds, then ramps to 20lbs over 4 seconds. Because there are 3 time elements to this control, this would be considered 3 stages. However, if the boost level increases from 8 to 12lbs after 2 seconds, then immediately began to ramp up to 20lbs over 4 seconds, this would be considered a 2-stage control, and therefore legal. Also note that timers are not the only type of delay to be considered a time element. If the rider manually delays activation via a button, or a shift counter is used to delay activation, both of these would be considered time control elements.

No form of mechanical boost control devices, outside of the air control valves of the electronic boost control unit, are allowed. This would include restrictions or valves in the air supply or delivery lines, variable pressure or flow regulators, or any mechanical, pneumatic, or electronic devices designed to affect the function of the waste gate. No type of manifold bleed-off devices other than a safety blow-off valve, are allowed. Air supply must be from an on-board reserve, such as an air tank or CO2 bottle. The use of turbo-generated boost to increase or control waste gate function is not allowed.

The function of all boost controllers must be able to be demonstrated to tech following a run. This demonstration must be performed exactly as the bike was used during the run, and with the engine not running. The use of any tools, external devices including air supplies, or any crew members other than the rider during this demonstration is not allowed. Installation of components, including electrical systems, must take into consideration this requirement of demonstration to tech.

EFI THROTTLE BODIES: Turbocharged entrants must utilize the original OEM throttle bodies for the year and model of bike. Throttle bodies may be bored or reshaped, and throttle plates may be replaced. Secondary throttle plates may be modified or removed, and inlet side of throttle bodies may be shortened or removed. Bore spacing and injector placement may not be modified, but injector mounts may be modified to allow the installation of aftermarket injectors.

4.3.1.1.3 SUPERCHARGING
Supercharged entrants will run under the same rules as turbocharged entrants.

4.3.1.1.4 NITROUS OXIDE INJECTION
Nitrous oxide may be used as a power adder, but may not be used in conjunction with turbochargers or superchargers.

4.3.1.1.5 DISPLACEMENT
Maximum engine displacement is based upon type of power adder and type of engine management system:
 

Power Adder	Displacement
Turbochargers	1370cc
Nitrous with Aftermarket EMS	1455cc
Nitrous with OEM Engine Control Module	Unlimited
Nitrous with Carburetors	Unlimited
Normally Aspirated	Unlimited

4.3.1.1.6 COOLING SYSTEMS
Cooling systems are required. Systems should be able to adequately cool the bike during any road course. Any cooling system used during the road course must remain on the bike throughout the event. Radiators must be mounted in original location.

4.3.1.2 DRIVETRAIN

4.3.1.2.1 CLUTCH
Slider clutches, engine-driven centrifugal engagement clutches, or any engine-driven lockup clutches are prohibited. Lockups must be mechanically attached to the transmission input shaft, and may not be mechanically attached to the clutch basket or any component positively driven by the crankshaft. No pneumatic, electric, or hydraulic clutch engagement or activation systems are allowed.

4.3.1.2.2 TRANSMISSION
Automatic transmissions prohibited. (See Transmission 2.2.3)

4.3.1.3 BRAKES & SUSPENSION

4.3.1.3.1 FRONT SUSPENSION
The use of retention straps permitted. See Front Suspension (2.3.2) for rules concerning travel and spring requirements. Minimum distance between the tire and lower triple clamp must be at least 1 3/4- inches with the rider sitting on bike.

FORKS: Forks must have been originally produced as OEM production units, no aftermarket or custom units allowed. Forks may be swapped between models. Standard production internal parts of forks may be modified to alter damping qualities. Aftermarket damper kits or valves may be installed. Fork springs may be replaced with optional or aftermarket springs. Fork caps may be modified or replaced to allow external adjustment of fork springs. Modifications to other OEM fork components are limited to those intended to shorten forks, limit travel, or alter spring or dampening function. Any replacement parts in the forks may not weigh more than the OEM part they are replacing.

TRIPLE TREES:
Turbo: OEM steering stem and bottom triple clamps. Top clamp may be aftermarket. Front axle offset may not be less than the original OEM distance. (See illustration in 4.2.5.3.1.1) The use of triple clamps, steering stems, stem bearings, offset bearing races, or any other components designed to increase or decrease the rake is prohibited. Axle must be in the center of the forks.

Nitrous: Aftermarket triple clamps are allowed, providing they have the same amount of offset for both the top and bottom clamp. Triple clamps must have a minimum of 1-inch forward offset, measured from the center of the steering stem to the centerline of the forks. The use of triple clamps, steering stems, stem bearings, offset bearing races, or any other components designed to increase or decrease the rake is prohibited. Axle must be in the center of the forks. Triple clamps can be made of heavy material only after AMA Dragbike approval of concept.

4.3.1.4 FRAME

4.3.1.4.1 FRAME
Stock frames required with no modifications. Frame must display vehicle identification number (VIN) in original location. On Suzuki Hayabusa models, removal of center stand bracket and lower cowling bracket is permissible.

4.3.1.4.2 GROUND CLEARANCE
Minimum 3-inches with rider sitting on bike, straight up perpendicular to ground with 8 psi in rear tire.

4.3.1.4.3 SEAT
Minimum seat height, with rider in position, seat compressed and 8 psi in rear tire, measured from lowest point of seating position to ground is 22-inches. Must use stock seat pan or approved aftermarket pans, upholstered with stock seat latches. Padding and upholstery may be modified or replaced. All seat pans must be upholstered.

AFTERMARKET PANS: Aftermarket seat pans are allowed, but must be pre-approved. Only approved manufacturers and part numbers are allowed, and must use original mounting hardware to attach to original frame rails and frame rail hardware. Designs constructed of fiberglass, aluminum, or injection-molded plastic will be considered. The use of carbon fiber, titanium, or other exotic materials is not allowed. A manufacturer’s label, with correct part number, must be laid in the resin on the inside of fiberglass parts, and may not be covered by paint or seat covering materials in order to allow viewing of the label materials used during construction. Labeling on seat pans constructed of other materials will be considered at the time of approval. Each interested manufacturer must submit sample parts for approval a minimum of 30-days prior to any event in which it desires approval eligibility. AMA Dragbike will retain sample parts for comparison during technical inspections.

4.3.1.4.4 WHEELBASE

4.3.1.4.5 RIDER WEIGH-IN
All riders must perform rider weigh-in prior to first round of qualifying. (See Weigh-In 3.2.6)

4.3.1.5 TIRES & WHEELS

4.3.1.5.1 TIRES
DOT Z-rated motorcycle street tires only, slicks prohibited. Type and size tire cannot be changed after road course. Tech must be informed prior to tire change for verification. (See Tires 2.5.1)

4.3.1.5.2 *WHEELS
Minimum rear wheel diameter is 17.0 Inches. Minimum front diameter is 17.0 inches, unless originally equipped with a smaller wheel. Front wheels smaller than 16.0 inches are not allowed on any entrant. Cast wheels must have a 180mm or greater width tire. Maximum rear width is 6.25-inch. Total weight of front wheel rotating assembly, including tire, rotor, bearings, etc cannot exceed 26 lbs. Front and rear wheels must be of matching styles and materials.

4.3.1.6 FUEL

4.3.1.6.1 FUEL
Any AMA Dragbike approved gasoline, no nitro, no alcohol (See Fuels 2.6.1). The use of nitrous as a cooling method is prohibited. Nitrous bottle must be contained within the frame rails and mechanically fastened, hose clamps prohibited.

4.3.1.7 *BODY

4.3.1.7.1 BODY
All main body parts, including tail sections and seat, must have stock appearance and shape (i.e., no one piece bodies or tank shell, unless originally equipped). Tail section or rear fender must extend past the rear axle. To allow access to nitrous bottle, all nitrous bikes must have thumb (butterfly) body fasteners on any aftermarket body pieces that cover bottle to allow removal of panel or section by hand without the use of tools.

FRONT BODYWORK: All front bodywork components must be OEM plastic or exact duplicate aftermarket plastic or fiberglass. All shapes and cutouts must be exactly as OEM bodywork for the particular year, make, and model of bike, and must be mounted in the exact OEM position. Body mounting system may be modified or replaced with aftermarket quick-release mounts. All bodywork and light assemblies must be correctly matched for the same year and model, and must be correct for the year and model of the frame (see 4.3.1.8.1). The mixing of different styles of bodywork or lights is not allowed. This will be strictly enforced. No carbon fiber is allowed for any bodywork, and fiberglass components must remain unpainted on the inside to allow viewing of the materials used in construction. Bottom of fairings may be trimmed for ground clearance. Minimal trimming or cutting for turbo or sidewinder exhaust is allowed, but only for the purpose of achieving exhaust clearance. Trimming for clutch access is allowed.

1998 and older motorcycles which were factory-equipped with 2-piece side bodywork are allowed to remove the lower body panels. The OEM or equivalent mid-panels must still be used, and must extend down to approximately the parting line between the engine cases and the cylinder block.

FRONT FENDER: A front fender is required. Fender may be OEM part or cosmetic duplicate aftermarket. Front fender may be spaced upward or downward for tire clearance. Modification or replacement of brackets or hardware for this purpose is allowed. Limited modification to forks for this purpose is allowed. The use of over-sized or “heavy” parts for fender mounting is not allowed. Rear of fender may be trimmed for radiator or exhaust clearance.

TAIL SECTIONS: Stock shape rear seat and tail sections will only be accepted with approved manufacturers and part numbers. The use of carbon fiber for these body panels is not allowed. A manufacturer’s label, with correct part number, must be laid in the resin on the inside of the part during manufacture. The inside of the body panel may not be painted to allow viewing of both the manufacturers label and the materials used during construction. Each interested manufacturer must submit sample parts for approval a minimum of 60-days prior to any event in which it desires approval eligibility.

FUEL TANKS: OEM fuel tanks are required, and must be mounted in exact OEM location. Modifications to the sump area for improved fuel pickup, or addition of fuel inlets or outlets is allowed. No modifications to visible areas of the tank are allowed. Fuel filler caps may be replaced with aftermarket bolt-on units only.

4.3.1.8 ELECTRICAL/CONTROL

4.3.1.8.1 LIGHTS & CHARGING SYSTEMS
Functional charging systems required. Aftermarket taillight w/ brake light, kill switch required. Turn indicators optional. Headlight is required to be on during road course and all qualifying and eliminations. In the event of failure, charging system will be inspected and repairs will have to be completed prior to next round. Auto shifters are prohibited. The use of control devices that prevent front wheel lift are prohibited. Two-steps prohibited.

HEADLIGHTS: Factory headlight systems must be used, and must be correctly matched for the year and model of the frame. The mixing of lights from different years or models is not allowed. The complete lighting system, including lens, housing, reflectors, bulbs, etc. must be intact. Mounts may be modified or removed. Bottom of headlight housing may be modified for greater front tire and/or fender clearance, but housing must remain enclosed to prevent the escape of light from under the fairing. Headlight must be mounted in the front fairing in the factory location. Non-fairing bikes must have headlight mounted in factory location. During competition, all bulbs normally operating during the factory low-beam setting must be lit at all times. High-beam setting need not be functional. Decorative headlight cover is allowed.

TAIL LIGHTS: OEM tail light assemblies must be used, and must be correct for the year and model of the frame. Tail lights may have their mounts modified if mounted to an aftermarket tail section. Tail lights must have both running and brake light systems fully functioning. Aftermarket lenses may be used on tail lights.

4.3.1.8.2 ENGINE MANAGEMENT & IGNITION

TURBOCHARGED ENTRANTS: EFI turbocharged entrants must use the OEM engine control module (ECM) to control the ignition and one injector per cylinder (2 per cylinder may be controlled on bikes factory-equipped with 2 injectors per cylinder). All injectors controlled by factory ECM must be mounted in OEM throttle bodies in original location. Approved aftermarket inline plug-and-play engine management tuning boxes may be used to adjust ECM.

EFI turbocharged entrants may use “piggy-back” fuel-only management systems. These systems may control a maximum of 1 injector per cylinder mounted in the intake plenum system. Alternately, bikes originally equipped with 2 injectors per cylinder may utilize one injector mounting location per throttle body to mount the piggy-back injector. Fuel management systems may only utilize inputs from engine RPM , manifold absolute pressure ( MAP ), and throttle position to control fuel delivery. No inputs from any other source, including any data-logging channels, may be used to alter fuel delivery. No part or function of the piggy-back system may be used to adjust the ignition system or ECM.

NITROUS ENTRANTS w/ OEM ECM: EFI nitrous entrants running under this classification must utilize the OEM engine control module (ECM) to control the ignition system and primary fuel delivery. Approved aftermarket inline plug-and-play engine management tuning boxes may be used to adjust ECM.

Additional fuel may be added utilizing conventional “wet” nitrous injectors, or utilizing a “piggy-back” fuel-only management system. Piggy-back fuel systems may control a maximum of 1 injector per cylinder, and may only utilize inputs from engine RPM , manifold absolute pressure ( MAP ), throttle position, and nitrous progressive percentage to control fuel delivery. No part or function of the piggy-back system may be used to adjust the ignition system or ECM.

NITROUS ENTRANTS w/ AFTERMARKET EMS : Any legal aftermarket engine management system ( EMS ) may be used (see 2.8.4.2). The EMS may control all fuel, ignition, and nitrous functions.

NITROUS ENTRANTS w/ CARBURETORS: Entrants utilizing carburetors and wet nitrous systems may utilize any legal ignition control system.

NORMALLY-ASPIRATED ENTRANTS: Motor-only entrants may use any fuel, ignition, or EMS to control fuel and ignition functions.

4.3.1.8.3 ELECTRONIC DEVICES
The use of shift lights, ignition kill modules, and electric-over-air shifters is allowed for all entrants.

4.3.1.8.4 DATA LOGGING
The use of any legal data logging is allowed (see 2.8.4.1-2.8.4.2). Turbocharged entrants may use passive data recording devices only.

Entrants using piggy-back fuel systems may record the outputs from the sensors used by the piggy-back controller. Piggy-back controllers may have internal data recording capability, but they may only record the data from the sensors allowed for use by the piggy-back controller. Wheel speed or other sensors may not be connected to, or recorded by, the piggy-back controller.

4.3.1.8.5 BATTERIES
Batteries may be replaced with one of a larger size.

TURBOCHARGED ENTRANTS: On turbocharged entrants, OEM battery box may be modified or replaced to accommodate a larger battery, but must be located behind the vertical plane passing through the swingarm pivot bolt.

DUAL BATTERIES: Non-turbo entrants are allowed to install a second battery to assist in starting. Batteries may be mounted anywhere on the bike, as long as it is within the bodywork.

For additional limitations on battery mounts, see 4.3.1.9.2 Ballast

4.3.1.9 SUPPORT GROUP

4.3.1.9.1 WEIGHT
No minimum weight for any entrant.

Real Street Champion - Jeremy Teasley
 

4.3.2 *REAL STREET CLASS REQUIREMENTS

DESIGNATION: RST , followed by rider number.

A true entry-level, limited budget class, Real Street is designed to give the entry-level racer a place to compete in heads-up, no breakout competition. Almost any racer currently competing in any Street ET class around the country can bring his or her bike, with little or no modifications, and experience true heads-up racing for the first time.

With no limits on internal engine modifications, the much-feared post-race teardowns will be avoided. Instead power levels will be controlled by limiting all entrants to an OEM-style, non-lockup clutch. This approach simplifies the tech procedures following record-claiming runs and post trace inspections. Only a minimal amount of disassembly will be required, because engine inspections will consist of primarily an inspection of the clutch and the fuel system.

Each bike may be required to compete in a 10-mile road course to prove street ability at selected events.

Ballistic blankets are not required for any entrants in this class.

This class is run as a “heads up” no break-out eliminator with a qualified field up to 32 motorcycles on a (.400) Pro tree.

4.3.2.1 ENGINE

4.3.2.1.1 GENERAL
Any internal modification is permitted. OEM engine cases and cylinder head casting must be used, but may be modified. Engine covers and crankcase breather covers may be replaced.

4.3.2.1.2 CARBURETOR
Naturally aspirated-only carburetor-equipped entrants are allowed. The use of nitrous, supercharging, or turbo-charging is not allowed on carbureted bikes. Aftermarket carburetors are allowed. Replacement of fuel injection with carburetors is allowed.

4.3.2.1.3 FUEL INJECTION
Only motorcycles originally equipped with electronic fuel injection may use fuel injection. All fuel supplied to the engine must be supplied by a single fuel injector per cylinder, or two injectors per cylinder on models originally equipped with dual injectors. All injectors must be mounted in the OEM locations No extra injectors, “piggy-back” fuel systems, “wet” nitrous systems, fuel jets or bleeds, “leaking” fuel lines or seals, or any other method allowing additional fuel into the engine are allowed. Any competitor found to have such equipment will receive a mandatory minimum suspension of 3 races, and a forfeiture of all points earned up to that point in the season.

ELECTRONIC CONTROL BOXES: Aftermarket fuel injection management systems that allow fuel or ignition timing adjustments are allowed. All units must be AMA Dragbike approved and available for immediate shipment from U.S. warehouses to any of the manufacturer’s U.S. retail outlets for sale to the public. Availability must be maintained throughout the current racing season.

Approved units that plug directly into the unmodified OEM wiring harness are allowed. Additionally, control units that require modification to the factory harness may be approved on a case-by-case basis by AMA Dragbike Tech. Any approved unit must be installed EXACTLY as per manufacturer’s instructions. Any deviation from manufacturer’s instructions is grounds for immediate disqualification for the remainder of the event.

FUEL DELIVERY: Fuel pump, pressure regulators, fuel lines, filters, and fuel rails may be replaced with aftermarket components.

THROTTLE BODIES: OEM throttle bodies must be used. Throttle bores may be modified, and throttle plates and shafts may be modified or replaced. Secondary throttle plates (if originally equipped) may be modified, deactivated, or removed. Throttle bodies may be modified to accept aftermarket injectors, but must be mounted in the original location, and at the original entry angle.

4.3.2.1.4 INTAKE
Original air box and air inlet ducts may be modified, removed, or replaced. Aftermarket air boxes or turbo plenums may be used. Aftermarket filters or velocity stacks may be used. Any sensors originally mounted to the factory air box may be relocated, but the factory wiring must be utilized. Vacuum hoses may be replaced, or rerouted to control turbo/supercharger waste gates or pop-off valves. Clamps may be added to any air or vacuum lines.

Engine crankcase or EGR systems may be modified or removed. If factory crankcase venting is removed, a legal catch can must be utilized.

4.3.2.1.5 ENGINE POWERPLANT
Any internal modification is permitted. Cylinder blocks may be bored, re-sleeved, or re-plated, but OEM block casting must be used.

4.3.2.1.6 FORCED INDUCTION

Turbochargers: The use of a single turbocharger is allowed. Ambient air-to-air inter-cooling and/or water injection is allowed. Cryogenic or liquid-to-air inter-cooling not allowed. Turbocharged entrants may not use nitrous oxide injection, alcohol, or nitro-methane fuels. The use of alcohol or other substance in water injection tank is prohibited.

Nitrous: Dry nitrous injection only. A maximum of 4 nozzles may be used.
Superchargers: Engine-driven superchargers allowed.

4.3.2.1.7 STARTING SYSTEMS
All engines must be self-starting. No push or roller starts. OEM-style starting systems required. The use of heavy-duty starter system components is allowed, as long as they are of a similar design as the OEM components they replace. The use of case reinforcements, heavy-duty starter covers, mounting plates, shafts and gears are allowed.

4.3.2.1.8 OILING SYSTEMS
Upgraded oiling system components are allowed. Aftermarket oil pump, pump drive gears and shafts, pressure regulators, and filters are allowed. Dry sump oil systems are not allowed. Mechanical or electrical turbo scavenge pumps are allowed. Fittings and passages may be drilled oversize, blocked off, tapped, or otherwise modified.

Factory oil coolers may be removed. Oil cooler lines, adapters, or fittings may be modified or replaced with bypass lines or fittings. Additional oil feed or return lines for either turbocharger lubrication, or improved engine lubrication may be added.

OIL PANS: Aftermarket oil pans and pickups are allowed. The minimum pan height for all models of bikes is 1.00”, measured at the center of the pan, unless otherwise noted.

4.3.2.1.9 COOLING SYSTEMS
OEM-style cooling systems must be used.

RADIATORS: OEM radiator must be used, and mounted in original location, with stock OEM hardware used for top radiator mounting. Bottom of radiator may be spaced forward to give additional clearance for exhaust or turbo systems. If an oil cooler has been removed and oil cooler shared a common bracket with the radiator, the bracket may be modified or replaced. Radiator inlets and outlets may be modified.

HOSES & FITTINGS: Coolant hoses may be modified or rerouted. Additional lines for turbocharger cooling may be added. Coolant hose adapters bolted to the cylinder block or cylinder head may be modified or replaced. Adapters must bolt to original location on block or head. Water Pump: OEM water pumps must be used, mounted in original location.

4.3.2.2 DRIVETRAIN

4.3.2.2.1 CLUTCH

CLUTCH COMPONENTS: Clutch basket (outer) and clutch hub (inner) may be replaced with billet aftermarket components. Aftermarket baskets and/or hubs must utilize original OEM clutch design. Clutch basket rear plate, rivets, and cushion springs may be reinforced, or may be replaced with heavy-duty aftermarket components of similar design. Clutch plates and springs may be replaced with aftermarket parts.

Modification or replacement of the OEM back torque and/or slipper clutch components permissible.

LOCKUP CLUTCHES: No aftermarket lockup clutches permitted. This includes any type of mechanical, pneumatic, hydraulic or electric assist.

CLUTCH COVER: Aftermarket quick access clutch cover permissible.

CABLE ACTUATED SYSTEMS: Aftermarket clutch control cables lines may be used.

HYDRAULIC SYSTEMS: Aftermarket hoses may be used. Slave cylinder reinforcement plates or brackets may be used. Aftermarket billet sprocket covers may be used.

4.3.2.2.2 TRANSMISSION
Modified OEM transmissions allowed. Automatic transmissions prohibited. (See Transmission 2.2.3)

The use of air or electric shifters is permitted. Auto-shifting devices are not permitted.

4.3.2.2.3 CHAIN & SPROCKETS
Chains and sprockets may be replaced with aftermarket components.

Front sprocket covers may be replaced with aftermarket components. “Case Savers” designed to protect engine cases in the event of a chain failure may be used.

4.3.2.3 BRAKES & SUSPENSION

4.3.2.3.1 BRAKES
Brake pads and brake lines may be replaced with DOT approved components. Aftermarket replacement brake rotors are permissible, but must have the same outer diameter and mounting pattern as OEM rotors. Stock OEM brake calipers are required, but may be polished, plated, or painted. One front caliper and rotor may be removed.

4.3.2.3.2 FRONT SUSPENSION
The use of a tie-down strap will be permissible, but once in place with the minimum ground clearance of 3-inches; 2-inches for a street-type exhaust passing under the oil pan, the excess strap must be secured to prevent any adjustment as to be determined by the Tech Director.

FORKS: Standard production internal parts of forks may be modified to alter damping qualities. Aftermarket damper kits or valves may be installed. Fork springs may be replaced with optional or aftermarket springs. Fork caps may be modified or replaced to allow external adjustment of fork springs only. A steering damper may be added or replaced with an aftermarket damper. Minimum required suspension travel is 1” (see 2.3.2). A steering damper is required.

Unless otherwise noted, all suspension hardware, including axle, axle nut, axle spacers, brake bolts, bottom triple clamp & hardware, steering stem & hardware, and fender mounts must be stock OEM components. No modification to increase front weight bias is allowed.

4.3.2.3.3 REAR SUSPENSION
Rear suspension must have a minimum of 1-inch travel. Either an aftermarket shock or aftermarket suspension link may be used, but not both. If using and aftermarket shock, you must utilize an OEM suspension rate linkage that came on the model and year of frame. If using and aftermarket suspension link, you must use a stock shock. Stock shock may be re-valved or utilize a different spring. Aftermarket “dog bones” and suspension connector links are permitted.

4.3.2.4 FRAME

4.3.2.4.1 FRAME
Stock frames required with no modifications. Frame must display vehicle identification number. Frames may be polished, painted, plated, or chromed. Steering head angle may not be altered. Wheelie bars are prohibited.

4.3.2.4.2 GROUND CLEARANCE
Minimum 3-inches; 2-inches for a street-type exhaust passing under the oil pan. Measurements will be taken with rider sitting on bike, straight up perpendicular to ground with 8 psi in rear tire.

4.3.2.4.3 SEAT
Minimum seat height, with rider in position, seat compressed and 8 psi in rear tire, measured from lowest point of seating position to ground is 22-inches. Stock OEM seat pan and seat latches are required. Upholstery and padding may be modified or replaced.

4.3.2.4.4 SWINGARM
Extended factory swingarms allowed. Bracing may be removed or added, but suspension mounting locations and swingarm pivot area must remain unmodified. Air tanks, nitrous bottle mounts, or other mounting points may be added.

Aftermarket swingarms constructed of aluminum or chrome-moly tubing are allowed. Swingarm pivot must be of the same dimensions as OEM swingarm. Suspension mounting locations must be the same as OEM swingarm. Clubfoot style arms are not allowed on any type of swingarm.

Bolt-on extensions are allowed, but design and installation must be approved by tech.

4.3.2.4.5 *WHEELBASE

Maximum Wheelbase - Measured from axle center to axle center.