SECTION 9 - GENERAL ROADRACING RULES

9.1 RIDER ELIGIBILITY
9.1.1 New AHRMA roadracers are required to provide evidence that in the past two years they have either successfully completed an accredited roadrace school or competed with another roadrace organization acceptable to AHRMA, including but not limited to AMA, CCS, WERA, AFM, etc. The minimum age for riders is 18. New, novice AHRMA roadracers may not be permitted to ride at certain venues.

9.2 MACHINE ELIGIBILITY
9.2.1 A motorcycle can bump-up one class, but may be ridden in as many classes as the machine is eligible, including that listed in the bump-up schedule below. With safety and fair competition in mind, the following schedule applies:
200 GP into 250 GP
250 GP into 350 GP
350 GP into 500 Premier
350 GP two-stroke into Formula 250
350 Sportsman into 500 Sportsman
500 Sportsman into 750 Sportsman
Pre-1940 into Class C
Class C into Classic Sixties
Classic 60s (500cc) into 500 Premier
Classic Sixties 650 to BEARS
Formula 125 into Formula 250
Formula 250 into Formula 500
BEARS into Formula 750
500 Premier, Formula 750, Formula 500 & 750 Sportsman into Formula Vintage
Novice Historic Production may not bump up into any other class
Vintage Superbike Lightweight into Vintage Superbike Middleweight
Vintage Superbike Middleweight into Formula Vintage
Vintage Superbike Heavyweight into Formula Vintage
9.2.2 Sound of Singles and Battle of Twins machines may bump up into any SOS/BOT class in which they are eligible under the class guidelines. Additionally, SOS Two-Stroke may bump up into Open Two-Stroke and Sound of Thunder. Open Two-Stroke may bump up into Sound of Thunder.
9.2.3 Depending upon size of grids, entries may be run together and scored separately at AHRMA’s option.
9.2.4 No roadrace class will be eliminated or consolidated without first being officially placed on a one-year probation. The probationary period is intended to give competitors an opportunity to support the class and show that it is viable.

9.3 TECHNICAL INSPECTION
a) All turn signals, luggage racks and mirrors must be removed. Non-essential brackets, braces, grab rails, and chain guards may be removed. Center and side stands must be removed.
b) Parts of the motorcycle that have sharp edges or corners and that present a cutting hazard must be smoothed or covered with at least 1/8 inch of rubber or other approved padding. These parts include, but are not limited to, foot controls and side stand lugs.
c) The motorcycle seat or fender must extend rearward beyond the line drawn vertically through the rear axle.
d) If used, oil coolers must be securely mounted in a protected area. Manufacturer-approved oil lines or properly installed aftermarket lines and fittings must be used.
e) An unbreakable catch tank or reservoir of at least 6-oz. capacity must be provided for any breather hoses venting the following: cam box or top end, crankcase, primary, gearbox, oil tank, and radiator or coolant tanks. Catch tanks must be situated so they will not normally overflow unless more than two-thirds full. Liquid-cooled machines must use only water or “WaterWetter” as a coolant, and a separate 6-oz. catch tank must be provided.
f) Oil containment. Oil containment systems are required on all roadracing machines. Oil containment pans on wet-sump engines must be designed to hold the capacity of the engine sump with nominal reserve. Material used must be durable, fastened safely and removable for inspection if required. The pan must have a retaining dam at the rear. Two-stroke and dry-sump machines must use a pan with a minimum capacity of one quart, or approved oil-absorbing material with a screen backing and fastened securely. Oil-absorbing material, securely retained in the bottom of the pan, is strongly recommended. All oil containment systems are subject to approval by technical inspection.
g) Kickstarters may not be retained on roadracers, except in Class C and Pre-1940 on handshift machines only. The kickstarter may be retained on supermotard type machines, provided the lever is equipped with a secondary restraint, such as an elastic band.

9.4 LOCKWIRE REQUIREMENTS
Because historic racing motorcycles have unique characteristics of construction, AHRMA has developed specific lockwiring requirements for roadracers. As a general rule of thumb, “If in doubt, lockwire it.” Note: Only stainless steel lockwire may be used. The following regulations apply in addition to those listed above.
a) Primary case filler, drain and level-check plugs must be lockwired.
b) Crankcase filler, drain and level plugs must be lockwired.
c) Transmission filler, drain and level-check plugs must be lockwired.
d) Any primary case, crankcase or transmission inspection plug must be lockwired.
e) Any primary case, crankcase or transmission overflow or vent hoses must be lockwired.
f) Oil filter nuts and oil filter plugs must be lockwired.
g) Fuel tank overflow lines must be secured and have a catch bottle or one-way valve provided.
h) Lockwiring of carburetor drain plugs, or securing with a fuel-proof sealant, is encouraged.
i) All flexible oil lines must be a reinforced oil and gas resistant hose, and must be secured by lockwire as secondary security, in addition to a swaged fitting or hose clamp. Total-loss oiling systems must be equipped with unbreakable catch bottles and/or a “select pad” diaper system.
j) All fuel and oil lines must be securely clamped or secured by other acceptable means, and will be pull-tested during tech inspection.
k) All fork drains must be safety wired or securely taped.
l) Exhaust systems must be securely mounted and bolts lockwired. A secondary security system is encouraged and may be required at the Tech Inspector’s discretion.
m) Brake torque arm bolt lockwiring is required.
n) If not lockwired, axle nuts must be secured with a cotter pin or other acceptable means.
o) Foot brake pedal pivot bolts and nuts must be lockwired.
p) All brake rods and cables with threaded adjusters must be wired or cotter-pinned to prevent the loss of the adjuster nut.
q) All throttle cables must be secured to the throttle housing by lockwire.
r) All disc brake caliper attaching bolts.

9.5 NUMBERS AND NUMBER PLATES
9.5.1 All roadracing, motocross and dirt-track competition numbers will be assigned by AHRMA’s national office. These numbers will remain in effect as long as a rider maintains a valid AHRMA competition license. However, a rider may be asked to surrender a two-digit number if he does not compete in at least one AHRMA event per year. All competitors must display their AHRMA-assigned number unless granted prior permission to run a different number at that event only.
9.5.2 Roadrace class champions from the previous year may display the #1 plate on their machine (see rule 3.6a). In combined-class racing, #1 plates must also display an upper-case letter (such as 1E). When used, letters must be at least 3 inches tall. Number-letter combinations for each class are:

9.5.3 All vintage roadrace numbers must be black on a white background except: Sportsman, black numbers on “school bus yellow” background, and Novice Historic Production, red numbers on white background, Sportsman and Novice Historic Production machines use 10x12-inch rectangular number plates; all others use rectangular plates 10x12 inches or oval plates no smaller than 9x11 inches.
9.5.4 All Vintage Superbike numbers must be white numerals on a green background
9.5.5 All BOT roadrace numbers must be black numerals on a white background.
9.5.6 All SOS roadrace numbers must be black numerals on a yellow background.
9.5.7 All Sound of Thunder roadrace numbers must be black numerals on a background of either white or yellow.
9.5.8 Numbers must be at least 7 inches high block style, with a stroke width of 1 inch and legible. There must be no less than 1/2-inch of space between numbers and between the numbers and the outside edge of the number plate. If a rider’s assigned number will not fit into a 9x11-inch oval, a larger background may be used, up to a 10x12-inch rectangle.
9.5.9 All machines must display three number plates - one mounted on the front and one on each side mounted in such a manner that it will not be blocked by the rider in the normal racing (seated) position.
9.5.10 Any violations constitute grounds for disqualification.

9.6 SCORING AND SERIES POINTS AWARDS
9.6.1 RACE FINISHES: The race is officially ended for all contestants at the completion of the lap the winner is given the checkered flag.
a) Should the checkered flag be displayed later than the official distance, the finishing order will be decided on the basis of the official distance. Under any other circumstance, the winner is the leader at the time the checkered flag is displayed.
b) Should a rider be given the checkered flag with or ahead of the actual winner, the rider will be scored as having completed the race in the race position the rider was running at that time.
c) Riders not yet receiving the checkered flag will be scored in order of finish and laps completed.
9.6.2 A “did not finish” (DNF) scores points in order of stoppage, but a “did not start” (DNS) will not receive points. A rider will score points if he is the sole class competitor. A rider must complete one full lap to be scored.
9.6.3 If two classes are run together in one race, a rider may ride one motorcycle in one class and be scored in the other class, provided the machine is eligible and entered in that other class. The rider shall start from the least favorable wave or grid position.
9.6.4 Points will be awarded at all roadraces according to the following schedule. National-championship events also award regional-championship points for the region in which the event takes place. Series awards are based on a rider’s best finishes in one-half of the total number of events in the series, rounded up to the next whole number if necessary (e.g., in a 19-event series, a rider’s 10 best finishes count). A rider must score points in at least two events to be eligible for series awards. Year-end scoring ties will be broken by the greatest number of first-place finishes, then second-place finishes, third-place, etc. In the event of an absolute tie, the oldest rider wins.

9.7 MECHANICAL REQUIREMENTS FOR VINTAGE CLASSES
9.7.1 All major components must be OEM parts or accurate, detailed replicas of the same parts using the same type materials and technologies. Major components may not be newer than the cutoff date specified for a class (e.g., no inverted forks in the vintage or Vintage Superbike classes). Composite materials not of the period cannot be used in any form in a vintage machine without prior approval of the Roadrace Rules & Eligibility Committee.The burden of authenticating is on the rider. Press clippings and photos with identifiable dates may be helpful.

9.7.2 ENGINES
a) Engines of any type falling into the classes listed may compete.
b) Engines must be naturally aspirated (no turbos). Superchargers are allowed only on Pre-1940 GP machines if original equipment.
c) Allowable overbore is a class’s maximum displacement plus the following limits, or the specific machine displacement, as in the performance-indexed classes (such as 200 Grand Prix and Classic Sixties 650): Cylinders may be bored to a maximum of .080”, singles; .060”, twins; .040”, triples; and .020”, fours. To determine displacement limits, .080”, .060”, .040” and .020”, as appropriate, shall be subtracted from the actual bore prior to calculation. Note: These limits do not apply to Class C and Pre-’40 classes, which have a maximum overbore of .080”.
d) The formula for calculating engine displacement in any class is: Bore x bore x .7854 x stroke x number of cylinders.
e) A 6-oz. minimum catch tank or reservoir must be provided for any breather hoses venting the following: cam box or top end, crankcase, primary, transmission, oil tanks, and radiator or coolant tanks. Such catch tanks must be situated so that they will not normally overflow.
f) Total loss primary chain oilers must be equipped with a system to prevent spillage onto the track.
g) All fluid plugs and fittings with oil or coolant behind them must be securely fastened or safety wired.
h) Liquid-cooled motorcycle engines must use only water or “WaterWetter” as a coolant, and a separate 6-oz. catch tank must be fitted.
i) Machines with chain-driven primary must have a chain guard.
j) Conversion to toothed-belt primary drive is encouraged as a safety measure.
k) Hydraulically assisted clutches are prohibited.

9.7.3 FRAMES
a) Frames shall be free of cracks and kinks.
b) All welds shall be structurally sound.
c) Roadracing motorcycles must have both front and rear suspension (except Pre-’40, Class C and sidecars).
d) No part of the seat or other parts to the rear may stand more than 37 inches above the ground when the motorcycle is unladen.
e) Unladen motorcycles must be capable of leaning at least 50 degrees to either side before contacting the ground (tires excepted).
f) Frames and swingarms must be made in the same type (tubing style) and manner as original or period. An eligibility request must be submitted for any frame or swingarm redesign or modification. A diagram of an approved tubular reinforced swingarm eligible for Formula and Sportsman machines is shown below. This swingarm was documented as having been constructed by Big D Cycle in 1971.

g) The motorcycle seat or fender must extend rearward beyond a line drawn vertically through the rear axle.
h) Gas-filled shocks are permitted, but remote or external reservoirs are not unless fitted as original equipment.
i) Monoshock or cantilever rear suspension is prohibited (except Vincent original equipment). Two rear shock- spring units are required and must not be inclined forward more than 45 degrees from vertical, one shock on each side.

9.7.4 TANKS
a) All tanks, whether for fuel, oil or coolant, must be leak-free and securely mounted.
b) Fuel tanks must be fitted with readily accessible shut-off valves in working order.
c) Positive clamping is mandatory on all oil, fuel and coolant line connections. Slip fits are not permitted.

9.7.5 TIRES & RIMS
a) Roadracing tires must be of modern racing compound only (DOT type permitted), no slicks, soft rain tires or hand cut slicks are permitted in vintage classes. Tires must be treaded and not excessively worn.
b) Wheels must be wire spoke type in Classic, Grand Prix and Sportsman categories. Spokes must be in good condition. Formula classes may use period cast wheels. Astralite (stamped) type wheels are prohibited, except in Vintage Superbike.
c) Tire warmers are prohibited on vintage motorcycles with treaded tires.

9.7.6 RIM SIZES
a) Grand Prix (200 GP, 250 GP, 350 GP and 500 Premier): Rim diameter must be at least 18 inches and not exceed WM3 (2.15 inches), except where fitted as original equipment (Ariel Arrow), minimum diameter 16 inches.
b) Formula 750: Rim diameter must be at least 18 inches and not exceed WM3 (2.15 inches) front and WM5 (3 inches) rear. Harley-Davidson XR750s may use WM6 (3.5 inches) when fitted with original Morris magnesium wheels. No Astralite wheels.
c) Formula 500: Rim diameter must be at least 18 inches and not exceed WM3 (2.15 inches) front and WM5 (3 inches) rear.
d) Formula 250: Rim diameter must be at least 18 inches and not exceed WM3 (2.15 inches) front and WM4.5 (2.75 inches) rear.
e) Formula 125: Rim width may not exceed WM3 (2.15 inches) front or rear.
f) Classic (Pre-’40, Class C, Classic Sixties): Rim diameter must be at least 18 inches and not exceed WM3 (2.15 inches), except in Class C and Pre-’40 when fitted as OEM (H-D and Indian), minimum diameter 16 inches.
g) Sportsman: Rim diameter must be at least 18 inches and not exceed WM3 (2.15 inches). WM4 (2.5 inches) rear rims are permitted on 750s only.
h) Novice Historic Production: Maximum rim width WM3 (2.15 inches) front and WM4 (2.5 inches) rear.
i) Vintage Superbike: Maximum front rim width 3.5 inches and 4.5 inches rear.

9.7.7 BRAKES
a) Efficient front and rear brakes are required.
b) Front disc brakes, where allowed, must be of the period; steel, rigid-mounted type; maximum diameter 12 inches. Caliper must be the two-piston period type. Discs permitted only in Sportsman and Formula categories - single front disc or drum in Sportsman 750, Historic Production and Formula 250; dual front discs or drum in Formula 500 and Formula 750. All GP and Classic classes must use front drum brakes.
c) Rear discs are permitted, provided they are period equipment. Rear discs are not permitted in Classic Sixties, Class C and Pre-1940 classes.
d) Any type of period drum brake is acceptable. Hydraulically operated drum brakes are prohibited. Refer to Class C, Pre-1940 and Classic Sixties rules for restrictions.
e) Air scoops, if fitted, must have screens and be clear of all working parts.

9.7.8 HANDLEBARS & CONTROLS
a) Handlebars must have a minimum width of 18 inches and a maximum width of 32 inches (except Class C and Pre-1940).
b) Handlebars, levers and the rider’s hands must have at least 1 inch clearance between the fuel tank or enclosed-type fairings, and at least 2 inches with cut-out type fairings.
c) Handlebars shall permit the front wheel to be turned at least 20 degrees to each side from a straight-ahead position.
d) Hand control levers must have ball ends at least 1/2-inch in diameter.
e) All controls must operate effectively and reliably.
f) All foot controls must be free from sharp or ragged edges.
g) Steering dampers may be added or changed.
h) All motorcycles must be equipped with a functional handlebar mounted kill switch. If the motorcycle is equipped with a magneto where an operational kill switch cannot be fitted, then the carburetor settings must be such that a running engine shuts off when the throttle is fully closed.
i) Throttles must be self-closing. All motorcycles that do not have a self-closing throttle, or machines on which a self-closing throttle cannot be used, must be equipped with a deadman switch mounted on the handlebar and attached to the rider.

9.7.9 FOOTRESTS
a) Footrests must be positioned for ready access to applicable controls.
b) Footrests may be solid or folding. If folding, they must fold up and to the rear at a 45-degree angle, and must be spring-loaded to prevent folding accidently.
c) Only one pair of footrests may be fitted per machine.
d) Footrests must be free of sharp or cutting edges.

9.7.10 FAIRINGS
a) Fairings, if used, must be mounted at no fewer than three points.
b) Fairings must not extend forward of a vertical line drawn through the forward-most part of the front tire. The front wheel must be visible from the side and it must be possible to see the rider completely, in the normal riding position, from either side and from above with the exception of the forearms.
c) No streamlining may be attached to the rider or the helmet. Leathers with “aero humps” are permitted.
d) Dustbin fairings are permitted only on pre-1957 GP-class roadracers.
e) Period fairings only. No fairings in Sportsman classes.

9.7.11 FUEL
a) Gasoline only; maximum 115 octane [using formula (R+M)/2].
b) Race gas available to all competitors at each event will be used as a standard for testing. Street gas with boosters or additives will be illegal if it exceeds the standard.
c) No fuel may be carried on a motorcycle except in tanks securely mounted for that purpose.

9.7.12 EXHAUST NOISE
a) Sound testing will take place at all AHRMA national events. This will be a pass-by test at a section of the circuit where machines are under full throttle. As dB(a) levels differ from circuit to circuit due to background and distance, only the worst offenders will be notified. Failure to meet track-imposed noise limits may result in disqualification from the day’s event and no refund of entry fees. These results will be posted and published in Vintage Views. At tracks where noise limits are in effect, AHRMA will adhere to the track’s policy.
b) All two-stroke machines must compete with effective silencers.
c) Exceptions may be granted for exhibition purposes only.

9.7.13 EXHAUST SYSTEMS
a) Period style exhaust systems are encouraged.
b) All exhaust systems must exit toward the rear of the motorcycle.

9.7.14 CARBURETORS
a) Flat-slide or Lectron type and injection type carburetors are not permitted. “Power jet” and “pumper” type carburetors are not permitted unless such mechanisms are disconnected or removed. Fuel injection is not permitted. Period carburetors are encouraged. Smooth bore carburetors with concentric float bowls are not permitted, except where they were fitted as original equipment or supplied as factory kits on that model motorcycle. Modern replacement smooth bore carburetors are not permitted.
b) A restrictor plate may be used where a minimum carburetor size is specified. A restrictor plate must be 1/8 inch thick with a constant diameter bore no larger than the required maximum diameter.

9.7.15 IGNITION
a) Conversion to solid-state (pointless) ignition is permitted (e.g., Lucas Rita). Electronic engine-management systems are not permitted. Any system that provides dynamic (vehicle in motion) electronic adjustments via rider selection or any other means is illegal.

9.7.16 REED VALVES
a) OEM-based reed cages must be retained; reed petals may be metal or fiber. Carbon-fiber reed petals are not allowed.

9.7.17 GENERAL
a) Two AHRMA decals of an approved design must be displayed in a conspicuous or readily visible position on the motorcycle. Decals are available at technical inspection at no cost to the competitor.

9.8 MECHANICAL REQUIREMENTS FOR BATTLE OF TWINS,
SOUND OF SINGLES AND SOUND OF THUNDER
a) Engine modifications: Unless specified, there are no restrictions on engine modifications. A competitor may modify the engine to any degree, as long as the class displacement limits are not exceeded, allowing a maximum overbore of .060 inch (1.5mm) in SOS and .040 inch (1mm) in BOT. Engines must be naturally aspirated (no turbos or superchargers), except four-stroke singles in Sound of Thunder.
b) Frames
1) Any frame manufactured by an OEM or any reputable aftermarket frame manufacturer is allowed. Custom frames are eligible, but only the highest standard of workmanship will be permitted. Frame modifications are allowed; however, they must be declared and brought to the attention of the Tech Inspector for inspection of quality and eligibility. Any frame considered inadequate by the Tech Inspector will not be allowed to race. This decision may be appealed to the Race Director only at that event. Contact the AHRMA office for clarification of confirmation of eligibility.
2) Frame modifications: Gusseting and strengthening is allowed, as long as it is done in a professional, safe, workmanlike manner.
3) Swingarms may be strengthened or changed to a different style or type, provided they are safe and tight in the frame.
4) Frames shall be free of cracks and kinks.
5) All welds shall be structurally sound.
c) Wheels: Rim diameter must be no smaller than 16 inches. Rim width should comply with the tire manufacturer’s recommendations.
d) Tires: Slicks, DOT or rain tires may be used. If the class or particular motorcycle is required to run under Supersport rules, only DOT tires or rain tires may be used. Riders should refer to their specific class rules to determine the type of tires legal for that class. Tires must be of a modern racing compound and must not show excessive wear. Tire warmers are permitted.
e) Brakes: Efficient front and rear brakes are required.
f) Suspension: Motorcycles must have both front and rear suspension. Gas-filled shocks are permitted, but remote or external reservoirs are not unless fitted as original equipment.
g) Exhaust: All machines must be equipped with effective silencers and exhaust systems must include sound attenuation material or devices. Open pipes and reverse cone megaphones are not effective silencers. Exceptions may be granted for exhibition purposes only. All exhaust systems must exit toward the rear of the motorcycle.
Sound testing will take place at all AHRMA national events. This will be a pass-by test at a section of the circuit where machines are under full throttle. As dB(a) levels differ from circuit to circuit due to background and distance, only the worst offenders will be notified. Failure to meet track-imposed noise limits may result in disqualification from the day’s event and no refund of entry fees. These results will be posted and published in Vintage Views. At tracks where noise limits are in effect, AHRMA will adhere to the track’s policy.
h) Fluids and fluid control
1) All liquid-cooled machines must use only water or “WaterWetter” for cooling. Antifreeze, ethylene glycol or other additives are prohibited. A separate catch tank of at least 6 oz. must be fitted to catch any overflow.
2) All fluid plugs and fittings with oil or coolant behind them must be securely fastened or safety wired.
3) A 6-oz. minimum catch tank or reservoir must be provided for any breather hoses venting the following: cam box or top end, crankcase, primary, transmission and oil tanks. Such catch tanks must be situated so that they will not normally overflow.
4) All tanks, whether for fuel, oil or coolant, must be leak-free and securely mounted.
5) Fuel tanks must be fitted with readily accessible shut-off valves in working order.
6) Positive clamping is mandatory on all oil, fuel and coolant line connections. Slip fits are not permitted.
i) Controls and footrests
1) Handlebars must have a minimum width of 18 inches and a maximum width of 32 inches.
2) Handlebars, levers and the rider’s hands must have at least 1 inch clearance between the fuel tank or enclosed-type fairings, and at least 2 inches with cut-out type fairings.
3) Handlebars shall permit the front wheel to be turned at least 20 degrees to each side from a straight-ahead position.
4) Hand control levers must have ball ends at least 1/2-inch in diameter.
5) All controls must operate effectively and reliably.
6) Steering dampers may be added or changed.
7) Motorcycles must be equipped with a functional handlebar mounted kill switch.
8) Throttles must be self-closing.
9) Footrests must be positioned for ready access to applicable controls.
10) Footrests may be solid or folding. If folding, they must fold up and to the rear at a 45-degree angle, and must be spring-loaded to prevent folding accidently. Only one pair of footrests may be fitted per machine.
11) Footrests and foot controls must be free of sharp or cutting edges.
j) Unladen motorcycles must be capable of leaning at least 50 degrees to either side before contacting the ground (tires excepted).
k) Bodywork
1) Fairings, if used, must be mounted at no fewer than three points.
2) Fairings must not extend forward of a vertical line drawn through the forward-most part of the front tire. The front wheel must be visible from the side and it must be possible to see the rider completely, in the normal riding position, from either side and from above with the exception of the forearms.
3) The motorcycle seat or fender must extend rearward beyond a line drawn vertically through the rear axle.
4) No streamlining may be attached to the rider or the helmet. Leathers with “aero humps” are permitted.
l) Fuel
1) Gasoline only; maximum 115 octane [using formula (R+M)/2]. Race gas available to all competitors at each event will be used as a standard for testing. Street gas with boosters or additives will be illegal if it exceeds the standard.
2) No fuel may be carried on a motorcycle except in tanks securely mounted for that purpose.
m) Two AHRMA decals of an approved design must be displayed in a conspicuous or readily visible position on the motorcycle. Decals are available at technical inspection at no cost to the competitor.

9.8.1 SUPERSPORT: The following are the allowable modifications for Supersport spec, where required by certain classes. Only the modifications listed in this section are permitted. No other changes are allowed. If it doesn’t say you MAY do it, then you MAY NOT.
a) Eligibility. Eligible Supersport machines must be sold by the manufacturer in the U.S. to the general public with full EPA and DOT approval (EPA/DOT approval not required for supermoto-type machines in Motard). A list of eligible motorcycles is available from the AHRMA office. No updating or backdating of parts is allowed. The frame will determine the year and model of the motorcycle. All other parts must be from that year and model of motorcycle. Motorcycles must display a valid U.S. VIN number on the main frame.
b) General. The following items must be removed: Turnsignals, mirrors, headlight. Taillight/brakelight must be removed or disabled. Taillight lens may be retained but must be taped over. Horn must be removed or disabled. Sidestand must be removed. The following items may be removed: Grab rails, reflectors, rear fender, helmet lock, passenger footpegs and brackets, chain guards, radiator fan(s) and wiring.
c) Frame. Frames must remain stock except for the following: crash bumpers/frame sliders may be installed; frame brackets/spools may be added to permit the use of stands; aftermarket chain guards/”shark fins” may be added; frames may be polished, painted or powdercoated, providing the VIN remains visible and readable. Subframes may be modified. Machines equipped with an OEM bolt-on subframe may replace the subframe with an OEM or aftermarket unit in steel or aluminum only.
d) Engine
1) Up to 1mm overbores are allowed only on machines with OEM cast iron cylinder liners. Only OEM pistons and rings may be used. There is no allowance for overbore on any other machines.
2) Cam sprockets may be modified or replaced. Cam chain tensioners may be modified or replaced.
3) Cylinder head, cylinder and crankcase gasket surface may be machined for increased compression. All other surfaces of the head, cylinder and crankcases must remain stock. Aftermarket gaskets may be used. Head and base gaskets do not have to conform to stock specifications.
4) Valves must remain stock. Multi-angle or -radius valve jobs are permitted.
5) Transmission must use stock OEM parts for that model and year. Shifter return or detent springs may be replaced. Electric shift devices (quick shifters) may be used.
6) Sparkplugs, clutch plates, clutch springs and oil filters may be replaced.
e) Bodywork
1) For motorcycles produced with full fairings, replica replacement bodywork may be used. If stock bodywork includes air ducting, it may be removed. If the ducting is retained, it must be stock or exact replica replacements and made of the same material as OEM.
2) Solo seat cowlings are permitted. Replacement solo tailsections are permitted providing they conform to the shape and size of the stock bodywork. OEM seats may be removed and replaced by foam padding.
3) Bodywork may be made of fiberglass, plastic, composite or carbon fiber. Bodywork may be attached with non-OEM fasteners such as Dzus.
4) For motorcycles produced without full fairings or with less than full fairings, replica replacement bodywork from any U.S.-legal production motorcycle may be used. All other rules as detailed above apply.
5) Fluid containment systems are required on all roadrace machines (see 9.3f).
6) Number plates may be added to the rear seat section.
7) Original instrument/fairing bracket may be replaced. No composite or carbon fiber brackets allowed.
8) OEM fuel tank must be retained and used in the OEM location. Fuel cap may be replaced.
f) Tires. DOT-approved race tires or non-DOT-approved rain tires must be used. No off-road or knobby tires allowed.
g) Suspension
1) Rear shock(s) may be modified or replaced. All linkage must remain stock. (Suzuki TL models are allowed to use aftermarket linkage to allow for replacing the stock rotary shock with a standard-style shock.) Front fork springs may be modified or replaced.
2) Fork oil may be changed. Fork caps may be changed. Fork internals may be modified or replaced. Fork braces may be modified or added. Triple clamps may be modified only for the purpose of adding a steering damper.
h) Captive wheels spacers may be added. Speedometer drive may be replaced with a spacer.
i) Steering dampers may be replaced or added.
j) Brakes. Steel braided or Kevlar brake lines may be used. Brake pads may be changed. Brake rotors may be drilled. Brake rotors may be replaced but must remain the same size as OEM. No composite or carbon fiber rotors. Brake calipers must remain stock. Brake and clutch master cylinders may be replaced. Clutch slave cylinders may be modified or replaced.
k) Induction
1) Carburetor jets and needles may be replaced. Resizing of air metering holes in CV carbs is allowed. Throttle slide and return springs may be replaced. Fuel lines, vent lines, and fuel filters may be replaced.
2) All components in the fuel injection system must remain standard except the electronic control modules, which can be modified or replaced.
3) OEM airbox must remain without modifications. Air filter may be replaced. Airbox drains must be sealed. Crankcase vent hose must remain routed to the airbox. Crankcase breathers may be modified or replaced.
l) Exhaust. Complete exhaust system may be replaced. Insulating pipe wrap is permitted.
m) Final drive. Final drive sprockets and chain may be replaced. Chain size may be altered. Sprocket carrier may be replaced. Machines originally equipped with a belt final drive may change to a chain-drive system.
n) Miscellaneous
1) Rider footpegs and brackets may be modified or replaced. Shift lever, rear brake lever and linkage may be modified or replaced.
2) Handlebars may be modified or replaced.
3) Instruments, instrument brackets, switches and associated cables/wiring may be removed or replaced. Unused wires may be trimmed from the wiring harness, but the original OEM harness may not be replaced.

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