Seller notes

Athena Big Bore Cast Piston +4mm #S4C05800001B for Yamaha YZ125 1997-2021 Product Details Athena Big Bore 2-stroke pistons are made from 4032 silicium Include 3% copper in materials for better heat resistance Production process allows for tolerances of just 0.01mm Kits include anti-wear coated piston, rings, pin and circlips Made in Italy NOTE: Only fits machines with Athena 144cc Big Bore Kit (sold separately). Fit GuideModelBig Bore Cast PistonBore58 mmCompression Ratio14:01:00Country of Origi...

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