01.2005.050 – Pro-X Piston Kit 40.50 mm For Yamaha PW50 & MJ50 1981-2025. Bore Size of 40.50 mm is 0.50 mm over STD.
- The smart solution to save money on engine repairs
- Manufactured in Japan and designed to be OE replacements.
- Cast from a high-silicon-content aluminum alloy that meets or exceeds OE specifications, then CNC-machined to extremely close tolerances.
- Pistons supplied in a kit package that includes rings, wrist pins and circle clips.
Fits Yamaha models:
1981-2025 PW 50
1982 MJ 50 Towny
