Ideal engine part to complete Koso's big bore kitUnique four-valve design increases air flow and performanceProvides more power and torqueFeatures a forged piston, stainless steel 24 mm intake valves...
Optional camshaft kit can be used with stock engine, but delivers improved results when used with 170cc Big Bore kit Honda -- MSX125 Grom -- (2014, 2015, 2018, 2016, 2017, 2019, 2020); Honda -- Z125M...