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Their big bore kits are a go-to upgrade for riders and shops looking for reliable
NCY PTFE-coated star vented racing clutch bell
DOT headlight for Grand Tourer starting in production year 2020
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e-watches and more - up to 4 smartphone recharges
Koso 170cc 61mm Big Bore Kit - Honda Grom & Monkey (2014-2020) 36 piece Their big bore kits areWant to unleash all the power your Honda Grom can handle? Koso's 170cc Big Bore Kit (MB623002) is the perfect addition for you! The kit includes a ceramic coated cylinder, 61mm forged piston, rings, pin, gasket kit and banjo bolts. Its compression ratio of 11. 5 to 1 will allow you to still use premium pump gas and keep the reliability of a stock motor. Made from the best components available on the market, Koso's 170cc big bore kit will amaze you!
