Vertex Piston 20-24 Yamaha WR 250 F 250cc +3mm Forged Big Bore Piston Kit 270cc.

Exact fit A, B or C pistons match your cylinder bore perfectly to maximize power and performance, while reducing blow-by and oil consumption. All piston kits include piston, rings, wrist pin and circlips required.

This Part Fits:

Year	Make	Model	Submodel
2012-2018	Yamaha	WR250F	Base
2011-2018	Yamaha	YZ250F	Base
2015-2018	Yamaha	YZ250FX	Base