General Track Rules
Go Karts
Greenwood Valley Action Tracks uses the World Karting Association’s motor specs, which can be found at this link – Rule Set.
The age and weight for each class is as follows:
Adult Cage: 16 and over – 410 lbs
Junior Cage: 12-16 – 365 lbs
Rookie Purple: 5-11 – 265 lbs
Rookie Blue: 7-11 – 285 lbs
Kid Karts: 5-7 – 125 lbs
Any interpretation or deviation of these rules is left to the discretion of the officials.
125s Micros RS motors allowed
270 Micro Sprints: These cares are powered by 250cc motorcycle engines bored out to 270 and they are modeled after sprint cars including the need to be pushed started.
600 Rules:
Transponder Location: Transponders are to be placed 21 inches back from the center of the front axle on the right side.
1. Sprint car appearance required. No rear engine cars or aluminum frames.
2. Body may be constructed of aluminum, metal, fiberglass or high impact plastic.
3. Minimum car weight, with driver, must be 800 lbs. at all times. Any add-on weight must be securely fastened, painted white with car number painted on, and not adjustable
4. Top wing refer to U6SA rule package.
5. Wheelbase must be between 58” to 65” maximum. Must have accessible fuel shut off valve and kill switch clearly marked. No belt drives or centrifugal clutches. Cars must have approved firewall between driver and engine compartment as well as between driver and fuel cell. Fuel cell is recommended. All cars must have side nerf bars, and metal belly pan is required (minimum.040”). It must run from in front of seat forward past driver’s feet. Cars must have front and rear bumper. Rear bumper must be suitable for push starts. No belt driven cars. Driver compartment adjustable suspensions allowed. Wing adjustments are O.K
6. All exhaust pipes must have muffler.
7. Battery must be securely fastened and covered to prevent spillage. All cars must be self-starting at start of all events. If car doesn’t self-start, you will go to the rear of the event.
8. Alcohol or gas. Absolutely no additives allowed; including performance enhancing products. Top end lube is allowed.
9. Seat belts must be 3” wide, 5 point approved racing harness. Helmet (min. SA2010) and approved full face shield required. Approved fire suit mandatory; (NOMEX underwear, headsock, two layer suit is highly recommended). Arm restraints, neck collars or head restraints, and racing gloves must be worn at all times. Chain guard mandatory. Aluminum racing seat is mandatory. Must have headrest and be padded.
10. Overall car width may not exceed 65”, from outside of right tire to outside of left tire. 10” maximum wheel diameter. Must be approved racing wheels. All brakes must be in good working condition.
Engine Rules
1. Overall Engine
· Must be a Production Motorcycle Engine, 4 cylinder, 4 stroke
· Must have engine, clutch, and transmission all in one unit
· Must be Chain Drive
2. Bore and stroke
· 640cc Maximum
3. Fuel
· Alcohol or gasoline may be used (if gasoline is used, a fuel tank bladder must be installed for safety purposes)
· Fuel Bladders will be mandatory in all cars starting in the 2009 racing season
4. Minimum weight
· Minimum weight at all times is 800 pounds, car and driver. If weight is added it must be
firmly bolted in place.
5. Right Rear must have pin installed at ALL times
These rules are intended to be the official track rules. However, we reserve the right to
amend and adjust any of the wording and interpretations as situations arise, either before or after the racing season begins. Any interpretation or
deviation of these rules is left to the discretion of the officials.
Greenwood Valley Action Tracks 