Description
The Yamaha YZ450F from 2003-2009 and the WR450F from 2003-2015 share an engine platform that Wiseco supports with this 12.5:1 compression forged piston kit.
A piston takes more repeated heat and mechanical stress than almost any other part in a four-stroke top end, and over time ring lands wear and skirts lose their tight tolerance to the cylinder. Wiseco built this kit as a forged replacement designed specifically for the YZ450F and WR450F architecture, holding a 12.5:1 compression ratio rather than a generic universal figure. Forging the piston, instead of casting it, is how Wiseco gets the tighter tolerances and improved tensile strength this application calls for.
- Forged construction improves tensile strength over a cast piston
- Designed for the specific YZ450F and WR450F engine application rather than a universal fit
- Built to a 12.5:1 compression ratio for this platform
- Manufactured to tight tolerances aimed at both performance and strength
- Part of Wiseco’s 4-Stroke Forged Series lineup
- Suited to riders replacing a worn piston during a routine top-end rebuild
- Backed by Wiseco’s long track record developing forged pistons for four-stroke competition engines
Sized for the 2003-2009 Yamaha YZ450F and 2003-2015 WR450F, this forged piston kit is intended for riders and mechanics refreshing a worn top end who want a piston built specifically for that engine rather than a generic replacement.
