PISTON KIT YZ400F/WR400F

• Manufactured in Japan and designed as OEM replacements
• Cast from a high-silicon content aluminum alloy that meets or exceeds OEM specifications, then CNC machined to extremely close tolerances
• Available in standard sizes along with fractional increases in standard sizes
• Standard B, C and D sizes extend the life of expensive plated cylinders
• Additional oversizes available in 0,010 increments
• Pistons supplied in a kit package that includes rings, wrist pins and circlips
• Pro-X rings and pistons are interchangeable and compatible with OEM pistons and rings
• NOTE: Standard size pistons do not require reboring or rehoning your cylinder. Oversize pistons will require reboring and rehoning of your cylinder.

OEM Numbers:  5BE-11631-01-A0