Wossner Piston Kit 1999-on Yamaha YZ250 & YZ250X 2T | 8217D Piston Size:66.35mm (A Piston / Single Ring) KFI: ST17 / A2000 /

KFI: ST17 / A2000 / A2500-R2 / A3000 / U45-R2 / U45w-R2 / SE25 / SE35 / SE45-R2 / SE45W-R2

and your cleaning cloth

Operating temperature: -20°C ~ 50°C

And one size fits all

It fits some of the 1998-2002 year models as well as the 2003-2010 125-530cc models

Wossner Piston Kit 1999-on Yamaha YZ250 & YZ250X 2T | 8217D Piston Size:66.35mm (A Piston / Single Ring) KFI: ST17 / A2000 /Wossner 8216DB 66. 36mm Dual Ring B Piston Kit fits 1999 on Yamaha YZ250 & YZ250X 2T Pistons made are with high quality, permanent skirt coating to reduce friction and piston rock for quiet and improved performance Optimized machining for lightness, as well as maintained strength in key areas such as crown and skirt wall cross section Forged from aerospace grade aluminum alloy Piston kits includes piston, rings, pin and clips