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CRF150/230F 03-Present
Standard torque arm fits late model bikes only
Combustion chamber shape and compression ratio are balanced
68-81 CT70
light weight high revving piston and a head gasket kit
Race Head Replacement - Head w/ Valve Kit Only - TBW0385 YZ125 CRF150/230F 03-PresentThis kit is for replacement on the TB Parts bore kits we sell. This DOES NOT work with stock piston. Must use a TB Parts (or similar) piston with proper valve reliefs. Cam NOT included. Race Head w large valves (25mm intake & 22mm exhaust) and better flow for increased performance. Bigger cooling fins. Includes all necessary parts and comes assembled
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