Section 11 – Vintage Motocross

6. Motorcycles must have period style exhaust. All exhaust systems must be equipped with an effective silencer, open pipes or open megaphones are not allowed. See rule 9.3.h. 7. No electronic traction control or quick shifters allowed. Lap timers are allowed.

c) CHASSIS AND FRAME

1. Frames must be steel or aluminum in round or square tube. No Deltabox allowed. 2. Frames may be braced and strengthened, period modifications only Subframes may be modified or altered. 3. Period swingarms allowed. 4. Rear shock may be replaced. Twin shock mounts may be repositioned. 5. Forks must be conventional non-inverted. 6. Wheel size requirements: 18 front, 18 rear; 17 front 18 rear; 16-inch wheels are allowed. Wheels must be of the period, spoke, mag, Astralite, etc. 7. Calipers must be axial-style, twin-piston. Dual rotors allowed. 8. No tire restrictions. Slicks, DOT, or rain tires allowed. Tire warmers permitted.

d) BODYWORK

1. Fuel tank and bodywork must be accurate replicas. Bodywork design must be of the period, 1974-1984. 2. Oil retention belly pan must be used on all machines. See rule 9.3.f. 3. Machines will not pass tech inspection with unpainted bodywork, bodywork in primer or bodywork that is damaged. 4. Period OEM and Race Team paint schemes are encouraged.

MISSION STATEMENT: The mission of AHRMA Vintage Motocross is to preserve a particular time in the history of the sport of motocross. This time period may not be the very beginning of the sport, but marks the period of international recognition after WWII. It ended in the mid-1970s and is considered to many around the world as one of the greatest eras of the sport. We want to demonstrate why this is stated. At the beginning of this time period, the machines raced were basic transportation-based models with slight modifications. They were raced over farmland settings with natural challenges. Higher speeds, terrain and off-camber turns provided the main challenges on these tracks that are typical of those used into the early ‘70s. Our era ends with the advent of specially-designed racing machines on specially prepared tracks. The main things consistent during this time period were the amount of suspension travel and the technique used to race these machines on natural tracks.

AHRMA Vintage Motocross is dedicated to preserving these machines, the sights and sounds, the racetracks and the riding techniques and strategies of this bygone era. Our rules are carefully crafted to make sure these machines will never become obsolete again. Note: A 10-year moratorium on adding new vintage motocross classes is in effect, beginning in 2018.