Seller notes

Namura Piston For YAMAHA YFM350 BIG BEAR 4X4 1997-1999 +1.5 Bore Bore Size: 84.45mm Size Over Standard: +1.5mmIncludes: Piston, rings, circlips, pinMachined smooth piston crown (unless otherwise noted) to reflect combustion heat while reducing carbon buildupHard anodized piston crown with a hardness of HRB 105MOS2 coating to draw heat through piston walls and out the bottomMinimized piston expansion and contractionPistons are more resistant to wear and scuffing, expand less with heat and are str...

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