The Cylinder Works 23001-G01 Top-End Kit is a complete big-bore replacement assembly designed for select Yamaha performance applications. The kit includes a cylinder, piston kit, piston rings, and gaskets, providing the primary components needed to refresh the top end without sourcing each part separately. Its standard-style cylinder appearance maintains an OEM-like look while supporting dependable replacement performance.
Nickel silicon carbide plating helps promote long service life, durability, and consistent cylinder operation under demanding riding conditions. The included piston and ring set is matched to the cylinder, while the gaskets help support a proper seal during installation. No machine work is required, making this kit a practical option for rebuilding a compatible engine with commonly available tools and installation procedures.
This Cylinder Works kit fits the 2004–2009 and 2012–2013 Yamaha YFZ450, as well as the 2003–2004 Yamaha YZ450F. Confirm the model year and engine configuration before ordering to ensure proper fitment. Manufacturer part number: 23001-G01. Vendor part number: 23001-G01.
Features:
- Complete kit includes cylinder, piston kit, piston rings, and gaskets
- Big-bore replacement assembly for compatible Yamaha engines
- Cylinder has an OEM-style appearance
- Nickel silicon carbide plating supports long service life
- No machine work required for installation
- Fits 2004–2009 and 2012–2013 Yamaha YFZ450 models
- Fits 2003–2004 Yamaha YZ450F models
- Manufacturer part number: 23001-G01
- Vendor part number: 23001-G01
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