Description
- Includes ceramic coated cylinder, 61mm forged piston, rings, pin, gasket kit and banjo bolts
- Ceramic coated aluminum cylinder
- 61mm bore, 11.5:1 compression ratio forged piston/ring kit (premium fuel required)
- Top end gasket kit and banjo bolts
Unleash all the power your Honda GROM can handle with the Koso 170cc Big Bore kit.
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