Koso North America Banjo Bolt Kit - Big Bore - Grom - MO623100

Optional camshaft kit can be used with stock engine, but delivers improved results when used with 170cc Big Bore kit. Banjo bolt kit designed for 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.