Description
If you’re running a 2007-2008 Yamaha YFM400F Grizzly and want measurable performance gains, a high-compression piston kit is one of the most direct upgrades available. The Wiseco 10.5:1 compression ratio increases power output and throttle response without requiring major engine modifications—just a straightforward piston swap. For riders who demand reliability under load, this precision-engineered kit delivers the durability needed for both trail riding and competitive use.
- Compression Ratio: 10.5:1
- Vehicle Fitment: YFM400F Grizzly 2007-2008
- Manufacturer: Wiseco
- MPN: 40076M08500
- Installation: Bolt-on
- Materials: Forged aluminum
- Precision engineered fit
- Gasket set sold separately
- Standard tools required
