ProX Piston Kit 01.2417.A

Part Number: 01.2417.A (often listed as PX-01.2417.A)Bore Size: 76.95 mm (Standard Bore)Compression Ratio: 13.5:1Material: Specialized low-expansion, low-friction aluminum alloy, similar to OEM Japanese manufacturersKit Includes: Piston, piston rings, wrist pin, and circlipsFitment: Yamaha YZ250F (2016, 2017, 2018)