Yamaha YZ250 / YZ250X ProX 18x22x22 small end / wrist pin bearing #21.2309 Rim Lock Nut Run Cool Pistons are made

Run Cool Pistons are made from a proprietary blend of Stainless Steel

KAWASAKI KX100 1995 - 1996 KAWASAKI KDX 125

Vent screw (M6x8) and small copper washer (BD36006) are included and mounted on the head

when it comes to engine oils

Yamaha YZ250 / YZ250X ProX 18x22x22 small end / wrist pin bearing #21.2309 Rim Lock Nut Run Cool Pistons are madeMade in Japan Part # 21. 2309 Size: 18 x 22 x 22 mm Features: Manufactured by leading Japanese OEM factories. Designed to exact OEM specifications to be a direct and cost efficient OEM replacement. Fitment: Make Model Year GasGas EC250 1997 2019 GasGas EC300 2000 2019 GasGas HP300 2000 2006 GasGas MC250 1997 2019 GasGas XC250 1997 2019 GasGas XC300 2000 2019 HONDA ATC250 1985 HONDA CR250 1985 HONDA TRX250 1985 HONDA TRX250 1987 1989 HUSQVARNA CR250