- Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during mid-season
- Kits include a top-of-the line MLSS head gasket and two or more premium-quality base gaskets of different thicknesses to optimize engine compression ratios
- Gives the rider a choice of using standard gas with stock compression, or race gas with a higher compression
- Kits do not include valve stem seals, rubber parts, shims, or other fiber gaskets
Yamaha -- YZ 250 F -- (2022, 2021, 2020, 2023, 2019); Yamaha -- WR 250 F -- (2023, 2022, 2020, 2021)