Seller notes

Namura Piston For YAMAHA YFM250 BIG BEAR 2007-2009 +1.5 Bore STD Comp Bore Size: 72.45mm Size Over Standard: +1.5mm Compression: 8.7:1 STD Comp Important: THE PISTON DOES NOT HAVE A MACHINED SMOOTH DOMEIncludes: 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 c...

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