PISTON KIT WOSSNER 76.97MM 14.4:1 YAMAHA WR250F 20-23 YZ250F 19-ON YZ250FX 20-ON

Wossner pistons are all forged and supplied with the appropriate piston rings, piston pin and clips. Made in Germany. 76.97MM Must use OEM Ring Set - not supplied High compression, race only This piston requires careful installation and strict adherence to all critical V/P and squish measurements. Additionally, the 3504D series piston requires use of OEM Yamaha rings.