TOP END KIT PRO-LITE 50.50/+2.00 KAW FUEL - Fits cranks that have

- Fits cranks that have a 13mm/16mm OD splines

2008 - 65 SX

2007 - 65 SX

1985 - ATC350X

The Koso 4V Head Kit is the ideal engine part to complete the Koso Honda Grom® Big Bore kit

TOP END KIT PRO-LITE 50.50/+2.00 KAW FUEL - Fits cranks that haveWiseco's complete top end Piston Kits are offered for nearly every popular motorcycle application. These kits contain everything you need to complete your rebuild the right way, the first time. High quality parts specifically chosen by us to match our forged pistons are included in this kit for easy one stop shopping. Each piston is built from race proven designs that are chosen by the top race teams in all forms of racing including Supercross,