23335B - Vertex Cast Big Bore Piston Kit For Yamaha YZ125 2005-2019

Features: The piston is heat-treated with a T-5 hardening and tempering cycle. The piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break in time and increased piston life. Cast piston is gravity-cast aluminum alloy (not forged) with 18% silicone content. Big bore piston increases engine's displacement, torque, and peak horsepower. Piston kit includes piston, rings, wrist pin and circlips. Kit Includes: • Piston • 1x Compression Ring • Wrist Pin • Circlips.