CLASS STRUCTURE

BIKE CLASSES

Notes on bike classes:
Bikes are classified by chassis type, engine displacement, extent of modifications, etc.
Conditions specified in the Tech Requirements section apply to all bikes, regardless of class.
We reserve the right to move a bike up or down in class.
We reserve the right to change class definitions at any time.
Eligible machines listed usually represent only a small sample of bike configurations meeting that class. If you have questions regarding your particular configuration, or are thinking of buying a new bike, please contact us via the Contacts page.

Definitions:
GP Chassis: Sport-bike / race-bike configuration.
Motard Chassis: Dirt bike frame but with street tires (no knobbies allowed).

Supersport
Frame:
GP Style or Motard Style with original frame.

Engine:
Same type as original engine that came on your frame from the factory (cannot swap motor for another type).
2 stroke air cooled: 50cc max, with stock unmodified motor, carb, intake, air box, etc. Aftermarket or modified exhaust ok. Carb re-jetting ok.
4 stroke air cooled: 110cc max, with stock unmodified motor, carb, intake, air box, etc. Aftermarket or modified exhaust ok. Carb re-jetting ok. Conversion from automatic to manual transmission ok.

Eligible machines include:
Yamaha YSR50 with everything stock except for aftermarket exhaust and carb re-jetting.
Kawasaki KLX110 with everything stock except for aftermarket exhaust, carb re-jetting, and manual transmission.
Honda XR100 with everything stock except for aftermarket exhaust and carb re-jetting.

Superbike
Frame:
GP Style or Motard Style with original frame. Any wheel, suspension and brake modifications allowed

Engine:
Same type as original engine that came on your frame from the factory (cannot swap motor for another type).
2 stroke air cooled: 60cc max, ok.
2 stroke water cooled: 50cc max, ok.
4 stroke air cooled: 110cc max, with 2 valve heads and stock valve size. Conversion from automatic to manual transmission ok.

MiniGP 50
Frame:
GP Style only.

Engine:
2 stroke water cooled: 50cc max, Stock carb, intake and air box. Carb re-jetting and modified exhaust ok.
2 stroke air cooled: 60cc max, any other modifications ok.
4 stroke air cooled: 110cc max, any other modifications ok.

Eligible machines include but not limited to:
Yamaha YSR50 with original motor bored out to 60cc max and modified, aftermarket carb and exhaust ok.
Honda NSR50 with everything stock including exhaust. Carb re-jetting ok.
Honda NSF100 with everything stock except for aftermarket exhaust and carb re-jetting.
GP style bikes meeting requirements for Supersport Class.

GROM
See CMRA rules


MiniGP
Frame:
GP Style only.

Engine:
2 stroke water cooled: 60cc max, Stock carb, intake and air box. Carb re-jetting and modified exhaust ok.
2 stroke air cooled: 60cc max, any other modifications ok.
4 stroke air cooled: 115cc max, any other modifications ok.

Formula 7
Frame:
GP Style or Motard Style.

Engine:
2 stroke air cooled: 60cc max, any other modifications ok.
2 stroke water cooled: 50cc max, any other modifications ok.
4 stroke air cooled: 115cc max, any other modifications ok.

Formula 6
Frame:
GP Style or Motard Style.
Engine:
2 stroke air cooled: 65cc max, any other modifications ok.
2 stroke water cooled: 60cc max, any other modifications ok.
4 stroke air cooled: 135cc max, any other modifications ok.
Formula 5
Frame:
GP Style or Motard Style.

Engine (if running GP Style):
2 stroke water cooled: 65cc max, any other modifications ok.
4 stroke air cooled: 150cc max, any other modifications ok.
4 stroke water cooled: 125cc, any other modifications ok.

Engine (if running Motard Style):
2 stroke air cooled: 81cc max, any other modifications ok.
2 stroke water cooled: 75cc max, any other modifications ok.
4 stroke air cooled: 150cc max, any other modifications ok.
4 stroke water cooled: 125cc, any other modifications ok.

Unlimited
Frame:
GP Style or Motard Style.

Engine:
2 stroke: 85cc max, any other modifications ok.
4 stroke: 150cc max, any other modifications ok.

Motard
Frame:
Motard Style only.

Engine: Same as Unlimited class.

Motard65
Frame:
Motard Style only.

Engine:
2 stroke: 65cc max, any other modifications ok.

Jr. Motard
Frame:
Motard Style only.

Engine:
2 stroke: 80cc max
4 stroke: 110cc max

Other requirements:
All machines must have automatic clutch, stock engine and stock suspension.
All approved 80cc 2-strokes with automatic clutch must run stock exhaust systems.
Four-strokes up to 110cc may replace the exhaust system.
With the exception of exhaust (4-strokes) and jetting changes, machines must remain stock.
Wheel changes approved, with a 14in Maximum size.
Handlebar may be replaced.

Eligible bikes include:
Honda Z-50
Yamaha TTR-110
Kawasaki KLX 110
Yamaha PW80

Pocketbike / Super Pocketbike / Unlimited Pocketbike / Scooter
Bring what you have. If three or more register, we’ll race ‘em.

RIDER CLASSES

Notes on Rider Classes:
Riders are classified by multiple factors such as age, weight, experience level, etc.
Additional requirements are in place for minors, please see the Minors section.

Experience:
Novice
Expert (If you or those around you think you are an expert.)

Weight:
Lightweight (Rider weighs less than 160 lb)
Heavyweight (Rider weighs more than 160 lb)

Age:
12 & Under(Rider younger than 13 years of age)

Combination:
Dinosaur (Rider over 200 lbs or older than 39 years of age)

RACE STRUCTURE

Notes on Race Structure:
On most race weekends, TMGP will typically run two types of races: Endurance Race and Sprint Races.
One endurance race is usually run on Saturday, and several sprints are usually run on Sunday.
A novice class rider may participate in any race designated for expert class riders, as safety permits.
A slower class bike may be ridden in any race designated for faster class bikes, as safety permits.
Age requirements shall be applied as necessary to maintain safety.

Endurance Race:
Each endurance race typically lasts between three and eight hours (usually four), and simultaneously runs the following bike class - rider class combinations:

GROM
Formula 7 – Novice
Formula 7 – Expert
Formula 6
Formula 5

Sprint Races:
Sprint races typically last between six and eight laps (usually eight), with each race running one of the following bike class - rider class combinations:

Supersport
Superbike
Scooter
Formula 7 - Novice
Formula 7 - Expert
Formula 7 - Lightweight
Formula 7 - Heavyweight
Formula 6 - Novice
Formula 6 - Expert
Formula 6 - Lightweight
Formula 6 - Heavyweight
Formula 5 - Novice
Formula 5 - Expert
Dinosaurs
Double D
Ladies
GROM
MiniGP
MiniGP 50
12 & Under
Unlimited
Backwards - Novice
Backwards - Expert
Jr. Motard
Motard - Novice
Motard - Expert
Pocketbike
Super Pocketbike
Unlimited Pocketbike

TMGP reserves the rights to:

Cancel or shorten any races with inconsistent grids.
Combine multiple classes to maintain grid consistency.
Move any bike and/or rider up or down in class.
Change class and race structure at any time.