- Big Bore Kit
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Koso Big Bore Kit Grom 170cc MB623002
Koso Big Bore Kit Grom 170cc MB623002. Unleash all the power your Honda GROM can handle with the Koso 170cc Big Bore kit. Includes ceramic coated cylinder, 61mm forged piston, rings, pin, gasket kit and banjo bolts. Compression ratio of 11.5 to 1.
Optional camshaft kit can be used with stock engine, but delivers improved results when used with 170cc Big Bore kit. Proper exhaust system must be used to prevent re-flow pressure and heat. For MORE GREAT DEALS on powersports parts and accessories! Your friends at MOTOMENTUM appreciate your Business! This part is designed and intended for competition use only.
It should not be installed on a vehicle that is driven on public roads and highways. Installation of this part on a vehicle driven on public roads and highways is likely to violate U. And Canadian laws and regulations relating to motor vehicle emissions.