PISTON KIT WOSSNER 76.97MM 14.4:1 YAMAHA WR250F 20-23 YZ250F 19-ON YZ250FX 20-ON Stock Item:PISTON KIT WOSSNER 76.97MM 14.4:1 YAMAHA WR250F 20-23 YZ250F 19-ON YZ250FX 20-ON Exclusive 5 mm-thick 2000 series

Exclusive 5 mm-thick 2000 series T6 aluminum alloy for superior tensile and yield strengths

YAMAHA IT 175 cc 1977/1981

JT Sprockets Front OE Steel T13 #520 JTF565

Internal ventilation

PISTON KIT WOSSNER 76.97MM 14.4:1 YAMAHA WR250F 20-23 YZ250F 19-ON YZ250FX 20-ON Stock Item:PISTON KIT WOSSNER 76.97MM 14.4:1 YAMAHA WR250F 20-23 YZ250F 19-ON YZ250FX 20-ON Exclusive 5 mm-thick 2000 seriesWossner 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.