Four Stroke Modifications

Stock Class Race Package

-This package will consist of properly degreeing of cams, transmission ASF, allowing transmission to free up tightness within itself. Blue print of bottom-end and proper re-build of motor. - Call for Pricing

Cylinder Head Porting

Increases the volumetric efficiency of your stock head, which enables the piston to pull a larger volume of air into the cylinder allowing you to burn more fuel, which ultimately results in your engine making more power. Factory tested and race proven!

Carb Modification

Carburetor Boring - $150

FCR Carb Mod

Using the right combination of 8 mods & adjustments, this mod increases throttle response thus eliminating any bogging. Package includes mod and all parts necessary. Call your buddy and get this discount today. *most popular mod for four-strokes* Ask about our 2005 to 2009 CRF250 carb inserts.