Moose Offroad High-Performance 4-Stroke Piston Kit Piston Kit - 77.00 mm - Yamaha

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Features Feature X-style forgings for ultimate strength, minimizing friction, durability, power, and weight reduction Full radius dome designs maximize quench while eliminating hot spots that promote detonation Internal bracing maximizes durability while decreasing friction in the pin assembly Piston kit includes wrist pin, rings, & circlips Made in the USA Specs Product Name Piston Kit Style High Performance Piston Material Aluminum Alloy / Forged Bore Size 77.00 mm Bore - Oversize Standard / Standard Compression Ratio 14.5:1 Engine Type 4-Stroke Units Kit Riding Style Off-Road Fitments Position Notes 2014-2018 Yamaha YZ250F - - Show more