Description
When your WR400F or YZ400F is pushing peak RPMs on the track or trail, your piston needs to handle compression spikes and sustained heat without compromise. The Wiseco 4649M09200 delivers the durability and precision engineering that separates reliable performance from catastrophic failure. Built from high-silicon alloy and sized at 92mm with a 12.5:1 compression ratio, this piston kit gives you the exact specs your engine demands.
This is a complete kit—piston, rings, and circlips included—so you’re ready for installation without hunting down separate components. Whether you’re chasing lap times or logging trail hours, Wiseco’s precision engineering ensures consistent power delivery and extended service life.
- 92mm bore diameter
- 12.5:1 compression ratio
- High-silicon alloy construction
- Includes rings and circlips
- Lightweight design
- Fits 1998-2000 WR400F, 1998-1999 YZ400F
- MPN: 4649M09200
- Complete kit, ready to install
