TEXAS MINI GRAND PRIX

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.

GP F7 & F6

Frame:
GP Style only.

Engine:
see F6 and F7 rules

GROM

See CMRA rules

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:
2 stroke air cooled: 81cc max, any other modifications ok.
2 stroke water cooled: 75cc max, any other modifications ok.
4 stroke air cooled: 160cc 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: 190cc max, any other modifications ok.

Motard

Frame:
Motard Style only.

Engine: Same as Unlimited class.

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 but not limited to:
Honda Z-50
Yamaha TTR-110
Kawasaki KLX 110
Yamaha PW80

Pocketbike / Super Pocketbike / Unlimited Pocketbike / Scooter / Pit Bike 50

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 175 lb)
Heavyweight (Rider weighs more than 175 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
Formula 5 - Lightweight ***New
Formula 5 - Heavyweight ***New
Dinosaurs
Double D
Ladies
GROM
GP F6 ***New Name
GP F7 ***New Name
12 & Under
Unlimited
Backwards - Novice
Backwards - Expert
Jr. Motard
Motard - Novice
Motard - Expert
Pit Bike 50

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.