Wossner Piston Yamaha YZ250F 14-15 / WR250F 15+ (Pro) (Hi-Comp) PHSTREETSINTERED(GF022S3) A die-cut EVA midsole with

A die-cut EVA midsole with egg crate constuction

and often in a failed voltage regulator

Consistent performance over multiple severe riding sessions

Grips more securely than a traditional rubber rim lock

Wossner Piston Yamaha YZ250F 14-15 / WR250F 15+ (Pro) (Hi-Comp) PHSTREETSINTERED(GF022S3) A die-cut EVA midsole withWossner is Germany's finest aftermarket forged piston and rod manufacturer and have over 25 years of experience in the high performance racing industry. Top European racers and FIM World Champions rely on Wossner for only the best pistons, rods and customer service. Features In house designed and manufactured; all forgings are produced in Wossner's company owned forging operation 4 stroke pistons are made using a double bridged forging design