- Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. 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 part, shims or other fiber gaskets.
Yamaha -- YZ 250 F -- (2014, 2016, 2015, 2017, 2018); Yamaha -- WR 250 F -- (2015, 2016, 2017); Yamaha -- WR 250 -- (2017, 2015, 2016); Yamaha -- YZ 250 FX -- (2015, 2019, 2016, 2017, 2018)