The Cylinder Works 20001 Cylinder Only is a standard-bore replacement cylinder designed for select Yamaha high-performance ATV and motocross applications. Built to provide a dependable stock-style fit, this cylinder is an ideal choice for replacing a worn or damaged original component while maintaining the factory bore specification. The cylinder is engineered for straightforward installation with compatible OEM or replacement top-end components.
Manufactured by Cylinder Works, the 20001 cylinder features a nickel silicon carbide plated bore surface. This durable plating helps improve wear resistance, support longer service life, and provide consistent performance under demanding riding conditions. Its stock-like appearance makes it a practical replacement for restoration, maintenance, or engine rebuilding projects where dependable fitment and factory-style appearance are important.
Fitment includes 2004–2009 and 2012–2013 Yamaha YFZ450 models, along with select 2003–2004 Yamaha YZ450F motorcycles. Verify the model year and engine configuration before ordering to ensure compatibility. This listing includes the cylinder only; pistons, rings, gaskets, and other installation components are not included unless specified separately. The manufacturer part number is 20001, and the vendor part number is also 20001.
Features:
- Stock-style cylinder appearance for a factory-compatible look
- Nickel silicon carbide plated bore for improved durability and longer service life
- Standard-bore design for compatible Yamaha engine applications
- Fits select 2003–2004 Yamaha YZ450F models
- Fits select 2004–2009 and 2012–2013 Yamaha YFZ450 models
- Cylinder only; confirm required installation components separately
Fitment:
2003 Yamaha WR450F
2003 Yamaha YZ450F
2004 Yamaha WR450F
2004 Yamaha YFZ450
2004 Yamaha YZ450F
2005 Yamaha WR450F
2005 Yamaha YFZ450
2005 Yamaha YZ450F
2006 Yamaha WR450F
2006 Yamaha YFZ450
2007 Yamaha YFZ450
2008 Yamaha YFZ450
2009 Yamaha YFZ450
2012 Yamaha YFZ450
2013 Yamaha YFZ450