ATHENA offers this replacement piston for the ATHENA Big Bore top end P400485100050 mounted on YAMAHA YZF, YZ-F 250cc 4 stroke from 2014 to 2017 and YAMAHA WR-F, WRF 250cc 4 stroke from 2015 to 2017. This piston VERTEX high compression will allow you to restore your cylinder to its original performance. Ideal in case of wear it is available in dimension A in 80,95mm and B in 80,96mm thus allowing to compensate the loss of compression due to the friction of the piston in the cylinder. This piston is delivered with its rings, pin and clips in C. We strongly advise you to mount the piston with new seals to avoid any compression loss. We recommend changing the piston every 10,000 km or 35 hours maximum!

Fits on:

YAMAHA YZF 2014

YAMAHA YZF 2015

YAMAHA YZF 2016

YAMAHA YZF 2017

YAMAHA WRF 2015

YAMAHA WRF 2016

YAMAHA WRF 2017