KOSO NORTH AMERICA Big Bore Kit

KOSO North America Big Bore Kit (150cc) for Honda Grom®/Monkey® Upgrade your ride with the KOSO NORTH AMERICA Big Bore Kit , designed to boost displacement while keeping the feel and dependability you expect from a street-focused 4-stroke setup. This 149cc big bore cylinder kit delivers stronger performance for everyday riding and enthusiastic street builds. Key Features 11.38:1 compression ratio engineered to run premium pump gas while maintaining stock-like reliability . Aluminum black powder-coated cylinder for durable performance. Includes 54mm forged piston plus rings, pin, pin clips , and a complete gasket kit . Specifications Engine Type: 4-Stroke Riding Style: Street Material: Aluminum Product Name: Cylinder Kit Style: Big Bore Units: Kit Displacement: 149 cc Color/Finish: Black, powder-coated Compression Ratio: 11.38:1 Weight: 2.6 lbs Choose KOSO and turn your Honda Grom®/Monkey® into a more powerful street-ready machine.