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TB Parts

TB Parts 88cc Big Bore Race Kit - All CRF70 XR70 - 91-94 CT70

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  • $ 251.99


Stock Head 88cc Big Bore w/ Cam & 20mm Carb Performance Kit (52mm)

All Years Honda CRF70 & XR70
91-94 Honda Trail CT70

- Lightweight aluminum cylinder with steel sleeve
- Cast in mounts on cylinder for aftermarket skid plates
- Oversized cooling fins on cylinder for efficient heat dissipation
- High compression 52mm piston with rings, pin, & clips
- Head gasket kit
- High performance race camshaft (11/4/04 - Updated camshaft - more aggressive lift and duration without sacrificing low end torque)
- 20mm Performance carb assembly. Includes: 20mm carb, intake, heatstop, gaskets, mounting hardware/wrench, air filter (not shown in pic) and long throttle cable (11/4/04 - Updated throttle cable - a new type is provided that allows for more adjustment and will work on wider selection of throttles)

We recommend purchasing a high volume oil pump kit (available in this section).
Installation Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal).


Replacement Parts:
TBW0365 - Piston
TBW0206 - Gasket
TBW0156 - Cylinder 
TBW0125 - Carb
TBW0273 - Intake
TBW0301 - Throttle Cable
TBW0398 - Air Filter
TBW0189 - Camshaft
TBW0294 - Jet Kit