Pro-X Racing Forged Piston Kit for 1999-19 Yamaha YZ250 - 66.36mm - 01.2321.B 2009 Yamaha YFM450 Grizzly 450 4WD/4X4 / Hunter / Spec. Ed. 2013 Yamaha YFM700R Raptor SE

2013 Yamaha YFM700R Raptor SE

return spring

1995 Ducati M900 Monster

1997 Arctic-Cat 454 2x4

Pro-X Racing Forged Piston Kit for 1999-19 Yamaha YZ250 - 66.36mm - 01.2321.B 2009 Yamaha YFM450 Grizzly 450 4WD/4X4 / Hunter / Spec. Ed. 2013 Yamaha YFM700R Raptor SEPro X Racing Parts Piston Kit ProX pistons are precision machined on the latest, state of the art CNC equipment. The same low expansion, low friction piston alloy is used as is used for all major Japanese engine manufacturers. ProX Piston Kits are a first class solution to replace the original piston in your Motorcycle, Scooter, Moped, ATV, Personal Watercraft, etc. Our OEM style Tin coated pistons assist the wear in process when you just started the