Seller notes

Wiseco ProLite Piston Kit Standard/Stock Bore 66.40mm- 804M06640 Yamaha YZ 250 1999-2023Yamaha YZ 250X 2016-2023 Durability, longevity and increased horsepower.Innovative high silicone forging and piston skirt provide maximum horsepower and torque.Lightweight wrist pins enable faster revs and quicker throttle response.Aerospace quality aluminum alloy.CNC Machined for high precision and tight tolerances.Moly coated skirts for reduced friction, better breakin and longevity (1) 66.4mm piston(2) 261...

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