All of our 125cc engine big bore kits are for 78mm tall cylinder engines only
Most China 125cc pitbike engines are 69mm tall cylinder type engines
Your engine MUST have a 78mm tall cylinder to use this kit.
Please see TECH LINK for more details
TBparts roller rocker race head V2 with 146cc big bore kit for China 120 & 125cc engines. Highest performance race head on the market with full parts support in stock!
Key Features:
- Roller rocker arms exactly like the V2 head for the KLX110
- 28.5mm intake Valve
- 23.5mm Exhaust Valve
- 5mm valve stem
- 23mm exhaust port
- Matching high compression piston head kits include all hardware
- 57mm piston with rings, pin, & clips
- 57mm all aluminum cylinder with steel liner
- High performance race camshaft (for the Race Head only)
- Head gasket kit
- OD of cylinder skirt is 59mm
Recommended:
- Sta-bil fuel stabilizer - W-57-1129
- 26mm Intake - TBW0433
Application:
- China 120cc & 125cc engines with a 14mm wrist pin
Kit Includes:
- TBW0751 - V2 Race head
- TBW0821 - V2 Head bolt kit
- TBW0752 - Cam
- TBW0754 - V2 Head cover set
- TBW0414 - Cam sprocket
- TBW0824 - Piston
- TBW0862 - Top end gasket set
- TBW0601 - Cylinder
See the performance info section for additional information on our performance parts.
