Cylinder Works Standard Bore Cylinder Kit for Yamaha, 66.40 mm (20009-K01)

Restore dependable engine performance with the Cylinder Works 20009-K01 Standard Bore Cylinder Kit for Yamaha applications. Designed as a direct bolt-on replacement, this ready-to-install kit requires no re-plating or machine work and is engineered to closely match the appearance of the original equipment cylinder. The standard-bore configuration provides a straightforward solution for replacing a worn or damaged cylinder while supporting consistent fit and reliable operation.
The kit includes a matched Vertex piston selected to work with the Cylinder Works cylinder for dependable longevity, responsive performance, and reduced engine noise. The cylinder features a Nickel Silicon Carbide plating process that helps provide a durable bore surface, strong wear resistance, and long service life under demanding riding conditions. This matched-cylinder-and-piston design helps simplify installation while maintaining the performance characteristics expected from a quality replacement component.
Each Cylinder Works 20009-K01 kit includes the cylinder, Vertex piston, piston rings, wrist pin, clips, and required gaskets for a complete top-end replacement. Ready-to-install components help reduce preparation time and eliminate the need to source individual parts separately. Manufactured in the USA, this kit is a practical choice for maintaining or rebuilding a compatible Yamaha engine with dependable replacement components from Cylinder Works.

Features:

• Direct bolt-on replacement requires no re-plating or machine work

• Standard-bore cylinder kit with 66.40 mm bore

• Matched Vertex piston supports longevity, performance, and reduced engine noise

• Nickel Silicon Carbide plated cylinder provides long-lasting bore durability

• Complete kit includes cylinder, piston, rings, wrist pin, clips, and gaskets

• Made in the USA

Ships from Parts Unlimited.