VERTEX offers this cast replacement piston for your original 77mm 250cc top end mounted on your YAMAHA WRF 250cc and YAMAHA YZF 250cc motocrosser. This piston has the same characteristics as the one received in your CYLINDER WORKS big bore 290cc cylinder. This piston is standard and the piston head is worked in such a way as to best compress your combustion chamber without altering engine reliability. Sold as shown, with piston, rings, 2 clips and piston pin.

Sizes available:

A:76.95

B:76.96

C:76.97

D:76.98

Fits on:

YAMAHA WR 250 F (RE25) 2018

YAMAHA YZ 250 F (CG34) 2016

YAMAHA YZ 250 F (CG39) 2018

YAMAHA YZ 250 F (CG39) 2017

YAMAHA YZ 250 F (CG40) 2019