Thumpstar GP - Intermediate Shifter
7. Thumpstar GP - Sponsored by Thumpstar
2008 Season Only
All bikes must be a TDX Super Thumpstar Air-cooled 125cc Single Cylinder 4-stroke. Stock Carburetor and intake, Stock Pipe, No modifications allowed except for Jetting for tuning. 4 Speed Manual stock Transmission required, 12" Stock Wheel Restriction (10" Wheels allowed for riders under 16). Must use stock forks and rear shocks, springs valve and oil may be changed. Must use stock master cylinder brake lines, brake rotors and calipers. Brake pads may be changed to aftermarket. Tires must be commercially available DOT tires or Vee Rubber medium compound slicks. No rain tires. You may change handlebars, grips and levers. Electric starter wiring for starter and battery can be removed or left in the motorcycle. Must run stock flywheel and ignition system, no aftermarket black boxes. Bike must retain one Thumpstar decal. If Thumpstar decal does not remain on motorcycle for the complete season then that rider forfeits any and all contingencies that could be handed out by Thumpstar or its Dealer.