Description
Unleash all the power your Honda GROM can handle with the Koso 170cc Big Bore kit.
Kit includes:
- 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
Not legal for use in California on pollution controlled vehicles, race use only in California – waiver available.
