GENERAL REGULATIONS

Each motorcycle, regardless of class or category, must complete and satisfactorily pass inspection by the Technical Department before being allowed to make a trial run or participate in any event conducted by AMA Dragbike. General regulation rules apply to all classes unless otherwise noted in class rules.

INDEX OF GENERAL REGULATIONS

2.1 ENGINE
2.1.1 Catch Can
2.1.2 Coolant
2.1.3 Cylinder Heads
2.1.4 Engine Types
2.1.5 Oil Blanket / Oil Catch Pan
2.1.6 Superchargers

2.2 DRIVETRAIN
2.2.1 Chain / Belt Guard
2.2.2 Clutch
2.2.3 Transmissions

2.3 BRAKES & SUSPENSION
2.3.1 Brakes
2.3.2 Front Suspension
2.3.3 Rear Suspension

2.4 FRAME
2.4.1 Ballast
2.4.2 Frame Construction
2.4.3 Handling Problems
2.4.4 Measurement Procedures
2.4.5 Parachutes
2.4.6 Steering Damper
2.4.7 Welds
2.4.8 Wheelie Bars

2.5. TIRES & WHEELS
2.5.1 Tires
2.5.2 Wheels

2.6. FUEL
2.6.1 Fuel Check
2.6.2 Fuel Lines
2.6.3 Methanol
2.6.4 Nitro
2.6.5 Nitrous Oxide
2.6.6 Propylene Oxide
2.6.7 Racing Gasoline

2.7 BODY
2.7.1 Bodies
2.7.2 Fairing & Body Mounting

2.8 ELECTRICAL/CONTROL
2.8.1 Air Shifters and Bottles
2.8.2 Batteries
2.8.3 Controls
2.8.4 Electrical Devices
2.8.5 Ignition Shutoff
2.8.6 Lights

2.9. SUPPORT GROUP
2.9.1 Air Bottles
2.9.2 Automobiles
2.9.3 Crew Members
2.9.4 Fire Extinguisher
2.9.5 Pets
2.9.6 RV’s
2.9.7 Starter Carts
2.9.8 Testing
2.9.9 Tow vehicles
2.9.10 Two-Way Communications
2.9.11 Warm-Up
2.9.12 Generators

2.10 RIDER & TEAM MEMBERS
2.10.1 Attire
2.10.2 Foreign Entries
2.10.3 Rider Safety Gear
 

2.1.1 CATCH CAN
Catch cans are mandatory on all motorcycles that do not utilize a stock crankcase breather routing to the air box. Engines with breather hose plumbed into a vacuum pump system also require a catch can for catastrophic failure. The catch can must be securely mounted. Use of suitable size hose clamps is allowed; wire ties / zip ties are discouraged.

DRY SUMPS: Entrants equipped with dry sump oil systems must have catch cans. Oil holding tanks do not qualify as catch cans. Oil holding tank venting system must contain a catch can with a minimum capacity of .5 quarts. All vents to ambient atmosphere must have an air filter to catch any oil mist.

2.1.2 COOLANT
Antifreeze containing ethylene glycol is prohibited. Radiator must contain water or AMA Dragbike approved Propylene Glycol replacement only.

2.1.3 CYLINDER HEADS
In classes where they are accepted, aftermarket cylinder heads will be permitted with prior approval and consent of AMA Technical Department. Cylinder heads must be stock-appearing with fins (on air-cooled models) and stock bolt pattern. Stock cam chain drive method must be used, (i.e., center crank drive or end crank drive).

2.1.3.1 CYLINDER HEAD RESTRAINTS
Injected V-twin nitro engine must utilize SFI 46.1 cylinder head engine restraints.

2.1.4 ENGINE TYPES
Must be an AMA accepted stock-type engine specifically designed and manufactured for production motorcycle use. Snowmobile engines permitted in PET. Automobile, aircraft or marine engines are prohibited. Any new concept must be submitted to the Tech Department for approval prior to competition. All engines must be started by self-contained starter or detachable electric starter. Push or roller starts are prohibited.

2.1.5 OIL BLANKET / OIL CATCH PAN

Required in FB, PM, PST, SST, RST, TG, SC, SF & PET and on nitrous or turbo bikes in any exhibition class; Factory dry sump engines without power adders are exempt from this rule. Also Top Fuel is exempt. Required on any bike using nitrous oxide, regardless of class, except for streetbikes utilizing a street-type exhaust passing under the oil pan. Engine must be equipped with a lower-engine-ballistic/restraint device; (unit must have official AMA Dragbike approved label sewn to outside of blanket). Ground clearance does not include blankets as long as a 2” or 3” bar can be passed under bike without solid obstruction. The use of a belly pan or sealed fairing in place of blanket allowed. All sealed fairings and belly pans must hold the contents of the engine crankcase. Stock street bikes within ten years of original manufacture date may also be waived from this oil blanket requirement.

2.1.6 SUPERCHARGERS
Superchargers must be separated from the rider by a steel plate not less than .125” thick and must cover entire exposed top surface of supercharger. A ballistic type explosion blanket is permitted instead of the steel plate. Blanket must meet SEMA specs 14-1 (not required for turbochargers). Supercharged machines using clamp-on rubber hoses as manifolds between the blower and the engine need not use a shield or blanket as blower protection, although adequate measures must be taken to firmly mount the supercharger to the machine. “Sneeze-Valves” on manifolds are highly recommended but are to be used in conjunction with the above requirements.

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2.2.1 CHAIN / BELT GUARD
Mandatory on all bikes. Chain or belt guards are to cover the width and at least the top run to the centerline of the sprocket of any chain/belts. The clutch assembly must have at least half of the side surface covered. The guards should be steel or .125” aluminum unless otherwise stock equipped and must be firmly mounted. Rear fender and seats are not chain guards.

2.2.2 *CLUTCH
No stress bearing part of any aftermarket centrifugal clutch may be cast material. Clutch cover must be adequate to protect the rider in the event of mechanical failure. Motorcycles with an engine-driven lock-up clutch may not be fired in pits unless rear wheel is elevated off the ground by a secure stand and/or front wheel placed against a solid object (competitor’s trailer, bike, van, etc.).

2.2.2.1 CLUTCH COVER
Any clutch covers constructed in multiple pieces must have screws, bolts or welded components. No epoxy or similar material may be used bond pieces.

2.2.3 TRANSMISSIONS

2.2.3.1 AUTOMATIC TRANSMISSIONS
Defined as any constant-mesh transmission which uses override-style shifting for any or all of the gear changes. Override shifting means that, during up-shifts, the transmission is briefly engaged in two gears at once, allowing power to be continuously applied to the rear tire during gear changes. Any transmission containing components that would allow the transmission to engage two or more gears simultaneously is considered to be an automatic. These components include, but are not exclusive to, windowed shift drums, split forks, split gears, split fork slider rings, gear or fork detent springs, etc.

Any aftermarket transmission utilizing pneumatic, hydraulic, electric, or other style drumless engagement is considered to be an automatic. Any transmission utilizing planetary gears is considered to be an automatic.

2.2.3.2 OEM-STYLE TRANSMISSIONS
Only transmissions utilizing constant-mesh design gears, with a rotating, ratcheting shift drum and forks, are considered to be OEM-style. All components must be contained within the engine cases, and must be in their original location.

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2.3.1 BRAKES
Must meet OEM brake specifications. Operational front and rear brakes are mandatory and must be in safe operating condition. Brake lines must be OEM type or braided steel hose or stainless steel line. Braided steel hose is highly recommended. Brake lines are to be routed and mounted properly to insure no contact with moving parts. Carbon fiber brake pads or disks are prohibited. The spreading of pads away from the disk is prohibited. Drilled disc brakes may be used if commercially manufactured or they meet the following requirements:

o The original diameter must be maintained as a minimum.
o Minimum thickness: .187”
o Maximum hole size .500” with all holes countersunk.
o No two holes closer than 1.25” center to center.

2.3.2 *FRONT SUSPENSION

Unless specified otherwise within specific class requirements, all entrants must meet the following front suspension requirements:

FRONT FORKS: Rigid forks prohibited. Hydraulic-dampened tube type only, with a minimum tube diameter of 34mm. All entrants must have a minimum of 1” travel in front forks, with sufficient clearance around the fender, fairing, headlight, exhaust, etc. to allow the forks, fender, and wheel/brake assembly to safely move across the full range of fork travel at any steering angle. Forks must have enough front spring force to keep forks extended at least .50” above compression bump stop with bike sitting level and rider seated in riding position. Travel is measured from the compression bump stop to the rebound bump stop. NOTE: Having 1” of exposed fork slider DOES NOT guarantee that 1” of travel exists.

No more than 1.5” of upper tube (2” on inverted forks) may be exposed above top triple clamp or clip-on, whichever is higher.

STEERING STOPS: Positive fork stops are required, with a maximum turning arc of 12 degrees in either direction. Stops must be cast or machined into the frame or steering neck, or may be welded to the frame or steering neck. Stops must have a shear strength equal to a 3/8” bolt.

LOWERING STRAPS: Nylon straps designed to limit front fork travel are legal in certain classes, check individual class rules for legality. Straps must be specifically designed for the purpose of front suspension lowering. Generic tie-downs not permitted. Travel limiting straps are not allowed on any wheelie bar-equipped bike, regardless of class. Retention straps are allowed only in SET, PET, SS, SST, RST, SF and SC (if not using a wheelie bar). Retention straps must be no more than three years from date of manufacture. AMA Dragbike Tech Officials may disapprove lowering straps that are not sufficient and could cause a safety issue.

2.3.3 REAR SUSPENSION
Suspension must be stiff enough that the frame will not “bottom out.”

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2.4.1 *BALLAST

Ballast is defined as any component attached to any part of the motorcycle, whose purpose is to add weight to the motorcycle. Any component, regardless of weight, which serves a structural, mechanical and/or performance enhancing function, is not considered to be ballast. (i.e., as a general reference, if the component in question can be removed without affecting any functions of the motorcycle, or decreasing structural integrity of the motorcycle, it is considered ballast). AMA Dragbike does, however, reserve the right to deem any non-ballast component to be illegal, if its excessive weight or design creates a safety hazard, or if its construction or implementation is of an unprofessional appearance.

MOUNTING BALLAST: Unless otherwise noted, or unless specific class limitations exist, ballast may be mounted to any portion of the frame, swingarm, seat mounts, rear sub-frame, fairing brackets, or any suitable structural component with sufficient strength to safely support the weight of the ballast during the run (see BALLAST MOUNTING HARDWARE for guidelines). Ballast may not be mounted to any part of the exhaust system. Ballast must be securely mounted by either approved welding (if permanently attaching ballast is allowed by class rules) or by bolting the ballast to its attachment points. All ballast must be mounted within the outer dimensions of the frame, rear sub-frame, swingarm, or bodywork. Ballast may not be mounted to any bodywork or other plastic or composite components, nor may it be mounted to any part of the riders’ body or equipment. Liquid or loose ballast is prohibited (i.e., water, sand, rock, shot bags, etc.)

BALLAST MOUNTING HARDWARE: Ballast components must be engineered with sufficient strength to safely support the weight of the ballast during the run. When fastening ballast, or any other bolt-on component, the following hardware guidelines are the minimum requirements:

3/8" or 10mm and larger bolts………………20lbs per bolt (10lbs for single bolt)

5/16" or 8mm bolt……………………………10lbs per bolt (5lbs for single bolt)

1/4" or 6mm bolt ……………………………..5lbs per bolt (Minimum 2 bolts required)

No bolts smaller than 1/4" or 6mm may be used to mount ballast. All bolts must be steel, with a minimum strength of Grade 5 (grade 8.8 for metric). If single bolts are used, then maximum weight capacity is cut in half. If bolts smaller than 5/16" or 8mm are used, then a minimum of 2 bolts are required regardless of the amount of weight. When mounting ballast to another sub-component (fairing stay, rear sub-frame, etc) both the sub-component and the hardware mounting the sub-component to the frame, engine, etc. must also meet these minimum hardware requirements. If ballast or sub-components are welded to the frame or other components, the welded joints must have a mounting strength equivalent to the bolt chart. The use of hose clamps, tie wraps, tape, etc. to mount ballast is prohibited.

When designing ballast mounts, the use of multiple small bolts on a wide mounting pattern is preferred to the use of 1 or 2 large bolts. Welded mounting brackets must be at least as strong as the hardware used to mount to the bracket. Ballast mounting systems should be engineered in a fashion that will not expose mounting components to excessive shear or bending forces during the run. AMA Dragbike Tech may deem any ballast mounting system illegal, if the design is not properly engineered to support the weight of the ballast during competition.

FRONT SUSPENSION & WHEEL ASSEMBLY: No ballast may be mounted to any portion of the front suspension, brake system, fender system, or rotating assembly. No parts of the front suspension, brake system, fender system, or rotating assembly may be remanufactured from exotic heavy materials, including tungsten steel, HD-17, or Mallory metal. No portion of the front fork leg assemblies may be replaced with a heavier replacement component. Aftermarket or custom forks may not be heavier than industry-standard OEM sport bike forks. Legality of such forks will be considered on a case-by-case basis.

Front suspension components other than the fork leg assemblies (this includes triple clamps, clip-on’s, fender mounts, brake calipers and hangers, etc.) may be remanufactured from any legal materials, but must be constructed to dimensions reasonable for the application, with hardware reasonably-sized for the application. Whenever possible, OEM components will be used as a reference when determining what are appropriate sizes and dimensions. Lightening holes, gun-drilling, and other weight-saving techniques utilized on the OEM components may be deleted. Pre-approval of custom or aftermarket components is highly recommended. The tech staff has final decision on all front suspension component matters, and will be closely monitoring the use of these components. Abuse of these rules will result in AMA Dragbike implementing a maximum weight for suspension components, resulting in racers being required to remove their front ends during post-race inspections. Implementation of this weight rule may occur at any time during the season.

FRONT AXLES: Front axle assemblies may be remanufactured or replaced with aftermarket components. No part of the axle or nut may protrude more than .75" beyond the outside of the fork legs. No part of the axle, axle nut, or spacers may exceed 1.50" in diameter. The total weight of the front axle assembly, including spacers, nuts, washers, etc. may not exceed 5 lbs total weight. The use of lead or other heavy materials is not allowed on any axle components.

2.4.2 FRAME CONSTRUCTION
All welding shall be performed using industry-standard TIG heliarc methods. Material should be 4130 chrome-moly. The minimum diameter for all sections, except braces, brackets and gussets, shall be 1.00”. If the top main tube is of a one-piece design it must be a minimum of 2.00” in diameter. Minimum wall thickness of all tubing is .058”. Aluminum chassis are prohibited without prior approval by AMA Dragbike. Minimum seat height (with rider in position and seat compressed) measured from lowest point of seating position to ground, 20-inches unless otherwise instructed per class rules.

2.4.2.1 GROUND CLEARANCE
Minimum ground clearance for wheelie bar bikes is 2” measured with rider sitting on bike, straight up perpendicular to ground with 4 psi (car tire), 8 psi (motorcycle tire) in rear tire. Minimum 3” on street bikes or other non-wheelie bar bikes unless otherwise specified in individual class rules.

2.4.3 HANDLING PROBLEMS
Any motorcycle deemed to have questionable handling characteristics may be required, before further competition, to make a solo pass during qualifying to demonstrate motorcycle and rider stability. Terms and conditions of pass will be determined on an individual basis. If a rider crosses the centerline or outer boundary line for a second time in qualifying, the rider will be disqualified from that event.

2.4.4 MEASUREMENT PROCEDURES
Overall measurements will be done as follows: Measure from the center of the front axle in a straight line to the center of the rear axle at the most extendible point on the swing arm, then from the rear axle (at its most extendible point) to the center of the wheelie bar axle; then add the two together to determine overall length.

2.4.5 PARACHUTES
The use of a parachute is limited to TF and FB only. (See section 16, paragraph 4:8 parachutes in the NHRA rulebook.)


2.4.6 STEERING DAMPER
Mandatory on all bikes 9.20 or quicker or 140 mph or faster, and may not act as fork stops.

2.4.7 WELDS
Welds must pass visual inspection. Extra attention given to welds on frames and controls. Grinding of welds is not accepted.

2.4.8 *WHEELIE BARS
Mandatory in all Pro and Sportsman classes 8.60 or quicker for safety, with the exception of PST, SST, RST, SS and SF. Highly recommended for safety in all legal classes with slicks. The lowest point of the wheelie bar wheels may not be more than 3-inches from the ground. May not exceed the wheelbase of bike and must be sufficiently cross-braced to prevent side whip. On all mounting bars, butt welds or inner sleeved bar designs must have visible welded reinforcement (i.e., inner sleeve with rosettes, clam shells, bolted, etc.). Wheels must be non-metallic. All side panels must be securely fastened at 24-inch intervals minimum. Not permitted in Street ET. *Top Gas entries with a minimum of 74" wheelbase is exempt from this rule.

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2.5.1 TIRES
Tires must be in good condition. The depth of tread or wear indicator in the center of a tire must be a minimum of 0.060-inches. DOT tires on any wheel wider than 6.25-inches must have bead lock. AMA Dragbike highly recommends that all car tires utilize a bead lock or rim screws, to attach tires to wheel. Non-bead lock wheels should utilize locking screws and should be installed at 45 to 90 degree angle in addition to side-mounted screws only. It is recommended that drag slick mounting screws only are used to prevent tire bead from unseating at high speed. Follow instructions from screw manufacturer. Holes drilled in wheel must have enough clearance to allow screws to pass freely through wall. Four screws per side minimum with eight per side recommended. For safety, tire width should not exceed rim width by more than two-inches, bead seat to bead seat. All stock wheelbase entries must maintain OEM front tire sizing.

2.5.2 WHEELS
The use of “spinner” style wheels or any wheel design that incorporates movable pieces while vehicle is in motion is prohibited. The use of carbon fiber or composites as any component on a drive wheel is prohibited on any car tire entry.

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2.6.1 FUEL CHECK
All bikes competing in classes which require a fuel check must have a method to provide a fuel sample from the fuel line system. Sample must be able to be taken from line between carburetor and fuel pump or petcock. On fuel injected systems, the sample may be taken from the low-pressure (return) side of the system, between the injectors and the fuel tank return inlet. Use of a “Pingel” Fuel Sampler (item number PFS1) for Lectrons application or (item number PFS2) for Mikuni/Keihin 5/16-inch application, or equivalent to enable sample collection is mandatory.

2.6.2 *FUEL LINES
Fuel lines that do not use AN-type connectors must be fastened with a metal clamp, band or fitting (no wire). Be careful not to over tighten. Carburetor-equipped entries using a gravity-feed fuel system and flexible fuel line such as Tygon or PVC may use wire ties or safety wire as clamps on these fuel lines. Any fuel line that is part of a pump-forced fuel system must use hose clamps or AN fittings at all connections.

NITROUS BIKES: The use of steel braided or reinforced fuel lines are highly recommended on all nitrous bikes. Flame-retardant covering, such as fiberglass or Silco, is required on ALL fuel lines on carbureted nitrous entries. Covering must cover the entire run of fuel lines. Carburetor feed lines must be clamped at both ends and covered. The use of safety wire or wire ties as clamps is permissible on carburetor feed lines only.

2.6.3 METHANOL (Alcohol)
Methanol is a clear, colorless liquid with a mild odor at ambient temperatures. Methanol is sold in two U.S. Federal Grades: A and AA. Either grade is permitted for use in AMA Dragbike competition, and racers should ensure that the methanol they purchase meets Federal standards of purity. The purity standards for each grade are listed in the NHRA rulebook. Methanol is tested and certified at AMA Dragbike events through the application of various chemical analyses as considered appropriate by Fuel Check personnel. To be considered legal, methanol used in AMA Dragbike competition must meet the Federal standards of purity. Any deviation from these standards because of impurities (beyond the limits established in the Federal specification) in the fuel sample will result in disqualification.

2.6.4 NITRO METHANE
Per class rules. Those running nitro methane with mechanically driven blowers must have accepted explosion-proof blanket and some form of “sneeze” valve or rubber manifold connection. Nitro entry’s tow vehicle must have an on-board ABC fire extinguisher. Dead-man ignition kill switch and dead-man fuel shut-off controls are mandatory. Tether must be attached to rider on opposite side of blower intake. Use of nitrous oxide with nitro is prohibited.

2.6.5 *NITROUS OXIDE
Nitrous oxide systems must be commercially manufactured with manufacture I.D. on all parts. Nitrous bottles must be DOT rated with a pressure relief valve and secured with a bottle bottom anti-drop strap to prevent the bottle from falling off. The use of frame or swingarm in place of a bottle for nitrous oxide is prohibited. The mounting of a nitrous bottle outside the frame rail is permissible on streetbikes only with the use of a AMA Dragbike approved nitrous bottle valve protector; otherwise, N2O bottles must be completely contained within the bike frame rail. Outside-the-frame bottles must be securely fastened with an approved bottle bracket. See Ballast (2.4.1) for requirements for bottle mount hardware.

BOTTLE HEATERS: Heating of nitrous bottle is only permissible if accomplished by use of thermostatically or pressure switch controlled heating blanket. Bottles must be mechanically fastened; hose clamps or tie wraps are prohibited. All nitrous bikes must have thumb (butterfly) body fasteners. (See Bodies 2.7.1) Purge lines must face away from the rider. It is highly recommended for all nitrous bikes to utilize a “backfire strap”, required in PM. Oil blanket or oil catch pan is mandatory on all nitrous bikes. Oil blanket or oil catch pan is mandatory on all nitrous bikes not utilizing a street-type exhaust passing under the oil pan. (See Oil Blanket 2.1.5.) Single stage nitrous is defined as one nozzle per cylinder.

2.6.6 PROPYLENE OXIDE
The use of propylene oxide is prohibited in all categories.

2.6.7 RACING GASOLINE
Only racing gasoline that appears on the approved AMA list is permitted. All gasoline will be checked against a AMA Dragbike sample for legality. Racing gasoline is defined for purposes of the Rulebook as a mixture of hydrocarbons only. Racing gasoline is tested and certified at AMA Dragbike events through the application of various chemical analyses as considered appropriate by fuel check personnel. Gasoline is a good electrical insulator, or dielectric, and its relative effectiveness as an insulator is represented by its Dielectric Constant. The average D.C. for the hydrocarbons which comprise gasoline is 2.025. This is defined as a reading of 0 with the certified AMA Dragbike fuel meter. AMA Dragbike maintains a reference book of dielectric readings for approved fuels. Fuel samples must measure within + or – 0.40 of reference book specifications on the certified AMA fuel meter.

Racers may request that their racing gasoline be checked before competition. AMA may elect to supply fuel to be used at any or all races and add a surcharge to cover expenses. Should AMA Dragbike elect this option, racers should be aware that they will receive 1.5 quarts of gas per round and govern their ballast accordingly.

For classes that require a spec fuel, SS (VP U4.2), PS (VP C-25) racers are responsible for bringing fuel or having fuel delivered to the track. Fish's Custom is the official supplier of VP fuels at AMA Dragbike events. Orders must be made prior to event. Please note that contingency is only paid on fuel purchased from track side vendor.

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2.7.1 BODIES
All nitrous bikes must have thumb (butterfly) body fasteners; all body fasteners must be able to be removed by hand without the use of tools to access nitrous bottles. Leading edge of the front of the body may have regular fasteners. Note that in case of accident and/or the potential of fire, if nitrous bottle and fuel shutoff cannot be accessed, damage to body may occur. All bikes must have front fender excluding Super Eliminator. All streetbikes must utilize a seat. Seats must be covered in upholstery. Tail section or rear fender must extend past the rear axle.

2.7.2 FAIRING & BODY MOUNTING
Care should be taken in the attachment of full fairing and side body panels. Wind load directly effects handling and steering input. Panels that become detached may result in loss of control. Fairings should be mounted in a position similar to the street bike it represents (i.e., headlight portion must point straight forward). Minimum 1” clearance required between front fender and headlight or fairing. For aerodynamic and handling reasons, the lower “nose” of bottom fairing should be placed close to the back of the front tire.

Mounting points should be as follows: At least two mounting points on top half of fairing mandatory. One in the center of the headlight supported by steering neck and/or one each side placed properly to support entire side of fairing, attached back to down tubes of chassis. Two points on each side of lower fairing are mandatory and must be securely fastened; no tie wraps or wire ties. The floor pan is the foundation for mounting the fairing and should be solid mounted. All structural mounts from inside the fairing back to chassis should be angled towards the front of bike to properly carry wind load. A mounting plate, suggested minimum size 1.5” x 2” must be used on the inside of the fairing at attachment points. All fastening must be fiberglass to metal; no fiberglass to fiberglass. Braces, brackets and gussets material should be 4130 chrome-moly steel with a minimum diameter of .375”.


 

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2.8.1 *AIR SHIFTERS AND BOTTLES
AIR STORAGE TANKS: Must be AMA Dragbike accepted. All pressurized bottles (i.e., air, CO2, etc.) used for air shifters, clutches, etc., must meet, and be engraved as meeting DOT specs. Standard low pressure air shift systems under 150psi may use non-DOT aluminum tanks if purchased from an approved supplier. All high pressure regulated air shift systems must use DOT approved tanks. PVC or plastic tanks are prohibited. Tanks must be mechanically fastened with a metal clamp or band. Tie wraps and zip ties are prohibited. Use of frame or swingarm as air storage permitted.

AIR SHIFTERS: All Pro Stock air shifters must be air over air. Electric over air shifters are permissible in all other classes where air shifters are otherwise allowed. Any class requiring an engine kill for shifting, and are utilizing an electronic engine kill, may not have air shifter wired in any manner that would allow the use of an undetectable auto-shift system. Shifter systems which use an electric or hydraulic force to make shifts are considered to be air shifters.

2.8.2 BATTERIES
Must be securely mounted within the frame, swingarm, or bodywork.

2.8.3 CONTROLS
Hand operated shifters below handlebars not permitted.

2.8.4 *ELECTRICAL DEVICES
The use of any device, electric, electronic, pneumatic, hydraulic or mechanical, etc. that displays or transmits any on-track data or track location data, or any device mounted anywhere on the bike or in or around the track facilities that utilizes any tree sensing system will be grounds for immediate disqualification from the event and loss of all AMA Dragbike points for the season. In addition to disqualification, the rider and any team members with knowledge of the use of such equipment are subject to fines and suspension from AMA Dragbike events for one year.

DELAY BOXES: Permitted in TG, SC & PET only. Delay box or Delay Device is defined as any device (electronic, pneumatic, hydraulic or mechanical, etc.) built for the express purpose of creating a delay between release of line loc button, or release of foot or hand brake, or release of clutch lever and the resultant action of the motorcycle. Delay device may only delay amount dialed in; analog or digital display permitted. Delay device may serve only to create a preset delay between the release of launch button and resultant release of the launch rpm rev limiter, line-loc, clutch, etc. causing initial movement of the motorcycle. Delay device may only be connected to clutch engagement systems; i.e., launch rpm rev limiter and/or trans brake and/or line loc, and/or clutch, dependent on motorcycle. Delay devices connected to data recorders or any other equipment is prohibited. Wiring of delay box/device must be fully visible and traceable by the technical inspector. Only delay boxes/devices fitting this description will be permitted.

TRANSMITTING DEVICES: Any device mounted on the bike or rider that is capable of transmitting data or information wirelessly is considered to be a transmitting device. This includes wireless transfer systems for pit communications to and from on-board data recorders, EMS’s, ignition control boxes, nitrous or boost controllers, and any other electronic devices.

Any bike competing in any index or dail-in class may not have any type of transmitting device mounted anywhere on the bike or rider during competition (see 2.9.10). Any teams in these classes that use a wireless system to transfer data files in the pits must remove the transmitter from the bike during competition.

Bikes in Pro classes and heads-up, no breakout sportsman classes may have transmitting devices on the bike or rider, but they may not be used during the run (see 2.9.10).

2.8.4.1 DATA MEASUREMENT
Data measurement is the process of using electronic sensors to measure various engine and chassis parameters. These sensors take physical properties such as pressure, temperature, speed, travel, acceleration, position, etc, and convert these properties into an electronic signal. These signals may then be used and/or recorded by various on-board electronic control systems including data recorders, boost or nitrous controllers, OEM or aftermarket engine control systems, etc. Some classes do not allow non-factory equipped data measurement devices, and some classes allow them, but with restrictions as to their function. Check individual class specifications for additional limitations.

While most types of data sensors are allowed, some types are specifically prohibited, unless they are OEM equipment. If an otherwise-banned sensor is installed by the OEM (such as a speedometer that uses front wheel speed), the sensor may remain intact and functioning, but it must function exactly as originally designed by the OEM, and may not be used by any non-original system or component on the bike.

PROHIBITED SENSORS: Any sensor that measures front wheel speed or position is prohibited. These include not only magnetic and inductive sensors, but infrared and other type sensors as well. Any sensors or devices that measure or detect front tire conditions including temperature or pressure are considered to be front wheel speed sensors, and are therefore prohibited.

All types of front suspension sensors are prohibited. Any sensor that measures any function of the front suspension including travel, distance, position, or external or internal fork conditions are considered to be front suspension sensors. Any mechanical, infrared, ultrasonic, or other type sensor that measures ride height is prohibited. In addition to standard electronic data measurement sensors, any electrical or mechanical device that may be used to activate, adjust, or tune any engine function based upon ride height, track position, front wheel speed, or front suspension conditions, is prohibited.

Any sensors, including infrared or ultrasonic, that measure the track Christmas tree or timing system, the track surface, or any structure of the track facilities are prohibited. Any non-contact sensor (sonic, infrared, radar, laser, etc) designed to detect or measure distance, position, or location is prohibited. The use of GPS, locator or position beacons, and locator or position transmitters is prohibited.

Third wheel sensors, which is the use of any wheel or rolling device other than the normal front steering or rear drive wheel/tire to measure speed, distance, or track position, is prohibited. This includes any sensors that detect or measure wheelie bar wheels.

ENGINE SPEED SENSORS: Any device that measures the position or speed of the crankshaft, or any shaft or component mechanically coupled to the crankshaft including camshafts, pumps, clutches, and transmissions, is considered to be an engine speed sensor. The use and/or function of these speed sensors may be limited by specific class requirements. Check individual class specifications for additional limitations.

REAR WHEEL SPEED: Rear wheel speed sensors are not limited to sensors that directly measure rear wheel speed. Speed sensors which measure rear wheel speed indirectly, such as output shaft speed sensors, and systems that derive rear wheel speed from transmission or engine speed sensors, are considered to be rear wheel speed sensors. The use and/or function of these speed sensors may be limited by specific class requirements. Check individual class specifications for additional limitations.

PRESSSURE SENSORS: All lines connecting sensor to pressurized fluids must be metallic or steel braided.

2.8.4.2 DATA RECORDING
Data recording is the process of storing data produced by data measurement sensors, with the intent and capability of reviewing the data after the completion of the run. Internal control values from ECMs and other electronic control devices may also be stored for later review and troubleshooting. Data recording is typically an internal function of an aftermarket EMS (see 2.8.4.3). Data may also be recorded by passive recording-only devices.

Data recorders may not detect, and they may not be activated by, radio transmitters, infrared, laser or sonic devices, or any track position devices or beacons. Also, they may not wirelessly (ie radio, infrared, sonic. etc) transmit or receive information during the run to or from any source (see 2.8.4 for additional restrictions). Any communication or transmission of information between components on board the bike must be done via hardwired communications.

PASSIVE DATA RECORDING: Entrants limited to passive-only data recording may not use the data generated by the data recorder system to affect or control any function of the motorcycle. Also, unless otherwise noted, they may not share the data output from any sensor with any other electronic control device, Unit must be powered on by separate switch, and must be wired in its own easily-traceable harness. Data may only be reviewed after the run. In passive data recording systems, rear wheel speed sensors (see 2.8.4.1) can only be used to record data, and may not be connected to nitrous systems, nitrous progressive controllers, nitrous timers, boost controllers, ignition timing controllers, ignition modules or any fuel injection components

2.8.4.3 ENGINE MANAGEMENT SYSTEMS (EMS)
Aftermarket EMS’s and related components, including firmware and software, must be commercially available for delivery within 30 days. Systems or components specifically designed for a particular individual, team, or application will be legal only if they are available for sale and delivery within 30 days to the general public, and are specifically listed in the manufacturers or distributors catalog and/or website. All components must be used as delivered from the manufacturer. No modification to any hardware, firmware, or software is allowed, unless performed by the manufacturer. Any violation of this rule, or any attempt to hide files or otherwise conceal the functions of any portion of the EMS will result in an immediate, mandatory one-year suspension of the rider and/or race team, $5000 fine, and forfeiture of all points earned for the season.

AMA Dragbike tech may, at any time, on any motorcycle in competition, examine the maps, settings, data downloads, or any function of the EMS or data acquisition system. Tech officials may conduct this examination in any manner, including performing the examination with a team representative as an observer only. It is the responsibility of the competitor to have ready, at all times, the required components to submit to this examination. This can include a laptop or PC, software, download cables, etc. It is also necessary that the competitor, or someone within the competitor’s team, is knowledgeable in the system being used, and is capable of assisting tech officials in navigating through any and all portions of the software. AMA Dragbike tech may also impound any component of an EMS or data recording system for further examination either on-site or off-site. Refusal to submit to any examination or failure to supply the required components for examination is grounds for disqualification and/or suspension.

EMS’s may not detect, and they may not be activated by, radio transmitters, infrared, laser or sonic devices, or any track position devices or beacons. Also, they may not wirelessly (ie radio, infrared, sonic. etc) transmit or receive information during the run to or from any source. Any communication or transmission of information between components on board the bike must be done via hardwired communications.

EMS SENSORS: Except as noted, any legal data measurement sensors (see 2.8.4.1) may be used with aftermarket EMS’s. Front suspension travel or load sensors are not legal, including passive, data-only sensors.

CLOSED LOOP: Some classes do not allow closed loop operation by EMS systems. Closed loop is defined as a system which uses input from either an oxygen, lambda, or exhaust gas temperature (EGT) sensors to tune and/or adjust fuel or ignition delivery. In any class restricted to open-loop operation, any oxygen, lambda, or EGT sensors may only be used to collect and record data, and may not be used to affect or alter any functions of the motorcycle.

2.8.4.4 TRACTION & WHEELIE CONTROL

The mandatory minimum penalties for anyone found to be using any type of traction or wheelie control will be a minimum one-year suspension of the rider and/or race team, a $5,000 fine, and forfeiture of all points earned up to that point in the current race season. The mandatory minimum penalties for use of rate-of-acceleration devices in classes prohibiting their use is the same as for traction control.

TRACTION CONTROL DEVICES: AMA Dragbike defines traction control as any device or system that measures front wheel speed, vehicle speed, or track location, then compares that information to rear wheel speed in order to detect and control rear tire slippage. Any device or system which alters fuel, ignition, boost, nitrous delivery, shift light, etc. based upon this information is considered to be a traction control device. Any device or system which utilizes a vehicle speed or distance-measuring device other than engine speed or rear wheel speed , including infrared and radar, is considered to be a form of traction control. Traction control devices are prohibited in all AMA Dragbike classes.

WHEELIE CONTROL DEVICES: Any device or system which capable of detecting front wheel lift is considered to be a wheelie control device. This includes any device which detects or measures front suspension travel or conditions. Also, any device that detects or measures front wheel speed or position is considered to be a wheelie control device. Wheelie control devices are prohibited in all AMA Dragbike classes.

RATE-OF-ACCELERATION DEVICES: AMA Dragbike defines rate-of-acceleration devices as any electronic device or system capable of measuring or analyzing the rate of acceleration of any rotating or reciprocating component on the bike, then using that measurement information to tune or adjust any function of the engine. Any electronic or mechanical device which uses rate-of-acceleration information to alter fuel, ignition, boost, nitrous delivery, shift light, etc. is considered to be a rate-of-acceleration device. Any system which compares a shaft speed or component speed to any preset, predicted, or estimated speed is considered to be a rate-of-acceleration device.

2.8.4.5 LEGAL ELECTRONICS
Legal electronics include: Delay boxes, ignition booster, stutter boxes, two-steps, nitrous timers, electronic throttle stops, electric shifters and shift lights. Motorcycles with electronic timers turning on nitrous oxide must also have a throttle switch to turn off the system when not at full throttle. RPM or timer activated automated shifters permitted in TG, SC and PET categories only. Wiring harness must be loomed in a fashion that would allow easy tracing and inspection of wiring (i.e., no taped or covered wires).

Electric over air shifter: (See Air Shifters 2.8.1)

2.8.5 IGNITION SHUTOFF
Must have a positive ignition cutoff switch attached to the rider with a lanyard of wire or similar device. Plastic lanyards must be crimped after looping. Switch must be in the low-voltage side of the ignition circuit. Ignition shutoff must disable all fuel pumps and nitrous systems. Many stock machines are equipped with a handlebar mounted thumb switch which can have a lanyard easily attached for the above purpose. Engine must shut off if ignition or fuel lanyard is pulled. In SET and PET, stock OEM motorcycles with OEM ignition shutoff is permitted in place of a lanyard. It is illegal to modify the OEM ignition shutoff (tip-over sensor) in any way. It is highly recommended that rider have thumb operated kill switch that enables the bike to be shutoff without removing hand from handlebar.

While it is fully legal to use a tether fastened to the kill switch, the preferred method is to use a kill switch that disconnects from the bike and disconnects the electrical circuit. In the event of a fall, it is possible that the OEM kill switch will not be actuated properly or that it can get knocked back on after the fall.

2.8.6 LIGHTS
All entries must have a functional taillight attached to motorcycle during night operation.

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This section addresses items not on the bike or rider.

2.9.1 AIR BOTTLES
All pressurized air bottles must be mechanically fastened to battery carts. The use of freestanding bottles is prohibited. The use of nitrous oxide in an air shifter is prohibited in classes where nitrous oxide is prohibited.

2.9.2 AUTOMOBILES
Only authorized automobiles (i.e., tow vehicle for trailers, VIP’s, media) will have pit access. Upon arrival at the event, each tow vehicle will have a special parking decal placed on it for the weekend. All other vehicles will be required to park outside the pit gate or in a designated spectator parking area. At some venues pit gates will be closed to all car traffic after 9am. Crew and family vehicles are prohibited.

2.9.3 CREW MEMBERS
All crew members who wish to have access to the starting line area must display their event wristband at all times. Pros are allowed a maximum of four crewmembers in the starting line area. Sportsman and ET racers are limited to two crewmembers.

2.9.4 FIRE EXTINGUISHER
All Nitro fuel entries and/or crew are required to have a loaded, serviceable fire extinguisher in their possession, or mounted on starter carts, or otherwise available for immediate use. Dry chemical or CO2-type extinguishers, 2 1/2-pound minimum size are recommended. On-board Halon fire systems are highly recommended on nitrous bikes.

2.9.5 PETS
Must be kept on leash at all times. Pet owners are responsible for clean-ups.

2.9.6 RECREATIONAL VEHICLES
Dumping of gray water is prohibited. Air conditioner and gray water drains must have catch can to collect water. RV’s are required to have an exhaust vent stack to route exhaust fumes up into the air and not at ground level. All RV’s are subject to search prior or during event to verify occupant count.

2.9.7 *STARTER CARTS
Carts must be equipped with enclosed batteries. Plastic marine battery boxes permitted. No open batteries. To prevent starters from rotating, it is highly recommended starters have a safety bar that rests against engine case or frame. It is required to have your bike number on your starter cart.

2.9.8 *TESTING
Private track rentals at national event tracks are not permitted within five-days of the AMA Dragbike event. Track test & tune day on the day prior to each event is operated by the tracks themselves and is permissible. Failure to comply will constitute a 100 point deduction. AMA Dragbike reserves the right to waive this rule for any event. Please check web site.

2.9.9 TOW VEHICLES
Tow vehicles (pit bikes) are to be the only non-racing vehicles allowed pit access. The use of pocket bikes, motorized scooters, go-carts, etc. are prohibited. Tow vehicles are to be used by participants and crewmembers only and must be identified with the rider’s class and AMA Dragbike bike number. These numbers may be painted on or number plates may be used on the front or side but must be in plain view when in use. Tow vehicles must have functioning lights; lights must be ON when the vehicle is in motion. Only one rider is allowed per pit bike and must have a valid driver’s license from their state of residence. NO CHILDREN ARE ALLOWED IN THE PITS ON ANY MOTORIZED VEHICLE. Crewmembers excessively speeding or children riding in the pits are subject to having their pit bike impounded for the weekend and are subject to a $100 fine to reclaim it. If any child or unlicensed rider is caught operating a motor vehicle of any kind, the team(s) associated with the vehicle and/or operator will be subject to disqualification from the event. A TENMILE PER HOUR SPEED LIMIT WILL BE ENFORCED AT EACH EVENT. All accidents are subject to punishment by state laws. All accidents should be reported to local authorities. AMA Dragbike is not responsible for taking action regarding damage or injuries but reserves the right to confiscate vehicles and levy fines appropriate to each situation on the day of the incident.

2.9.10 TWO-WAY COMMUNICATIONS
The use of two-way radios for the purpose of voice communication between rider and crew is permitted in pro classes and heads-up, no breakout sportsman classes. Bikes and riders in index or dial-in sportsman classes are prohibited from carrying or using any radio communications devices during competition. If any rider or crew member finds that they are communicating on the same frequencies as track officials anywhere on or around the track facilities, they must switch to a different frequency. If anyone using a radio device finds that they are on the same frequency as other competitors, please be polite and switch. For additional limitations and restrictions on the transmission of non-voice information, see 2.8.4.

2.9.11 WARM-UP
Due to specialty transmissions having no neutral gear, it is mandatory that a skilled rider be seated on the motorcycle at any time the engine is running. This is mandatory on all motorcycles, regardless of transmission type. Burnouts and dry hops are prohibited anywhere outside the starting line area.

2.9.12 *GENERATORS
All generators must utilize a reasonable muffler/silencer. If the generator causes significant noise or fumes, an Official will ask you to move your pit area. Failure to comply with Officials request will constitute a disqualification from the event and removal from the premises.

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2.10.1 CASUAL AND PIT CREW ATTIRE
All clothing must be family oriented. Profanity or vulgar pictures are prohibited. Due to new television contracts, only uniformed crews are allowed in the burnout and starting line area. No T-shirts, tank tops or improperly dressed persons will be permitted. Shorts should be color coordinated with shirts and shirts tucked in or square hemmed.

2.10.2 FOREIGN ENTRIES
Non-North American entries may submit FIM rules per category for consideration of entry into an AMA Dragbike class using FIM rules. A review by tech will determine eligibility.

2.10.3 RIDER SAFETY GEAR
It is the responsibility of the rider to select a helmet and apparel which will provide appropriate protection. Although AMA Dragbike approves materials, AMA Dragbike does not endorse or guarantee specific products or manufacturers. Riders must rely on their own judgment in the selection of helmets and apparel for protection and durability.

2.10.3.1 HELMET
Full-face helmets meeting SNELL 2000 or 2005 specs are mandatory. The SNELL label must be inside the helmet and not tampered with. A SNELL decal on the outside of the helmet is not acceptable. BSI, ACU & ECE specs are accepted. BSI & ACU decals must be affixed to the back of the helmet. Streamlining attached to the rider or to his/her helmet is prohibited. Long hair must be braided or tucked into helmet or into leathers.

2.10.3.2 PROTECTIVE CLOTHING
Leather jackets, full-face helmets, eye protection, leather gloves and leather boots are mandatory in all classes (no driving shoes or sneakers). Any motorcycle participants running an elapsed time in the quarter mile of 9.99 seconds or quicker, 120 mph or faster or using nitrous oxide, nitro methane, supercharger or a turbo charger and all exhibition motorcycle riders are required to have full leathers. The use of synthetic material riding suits is prohibited. The use of stretchable Kevlar and perforated materials in non-critical areas are permissible. Fashion leather, including suede, is not permitted. Suits must be one-piece design or joined together with a “full circumference” zipper at the waist. Leathers cannot be too big or loose. Critical area (knees, elbows, forearms, shoulders) armor or 2-layers of leather is highly recommended. AMA Dragbike requires that all new construction by leather manufacturers include critical area armor. A spine protector is highly recommended especially in all Pro classes and non-wheelie bar bikes. Temporary motorcycle stands cannot be placed inside the suit.

Example of acceptable gloves.

Riders of motorcycles burning pure methanol are recommended to wear Nomex underclothing due to invisible flames. TF contestants are required to wear Nomex helmet sock.

Gloves must be road race type with additional Kevlar or similar palm patch or buttons, minimum 3” gauntlet cuff with wrist closure. Metal wrist band watches are prohibited. Leathers, gloves or boots with excessive wear or holes are prohibited.



Example of acceptable boots.

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