Cylinder Works Cylinder Kit - Big Bore - 52.50 mm - Yamaha - 21007-K01

Cylinder kit includes matching Vertex pistons to ensure longevity, performance and reduced engine noise. Kit includes cylinder, pistons, rings, pin, clips and gaskets. Cylinders have a nickel silicon carbide cylinder sleeve. Look virtually identical to OEM cylinders. Made in the USA. Cylinder does not require machine work (unless noted)..