Vertex 23641A Forged Replica Piston Kit - Standard Bore 87.96mm, 13.5:1 Compression engine-crankcase-components-crank-bearings-seals 1987-2004 Yamaha YZ125

1987-2004 Yamaha YZ125

1999-2001 Yamaha XVZ1300AL Royal Star Boulevard

1995-2005 KTM 250 EXC

Fits 16mm and 5/8in

Vertex 23641A Forged Replica Piston Kit - Standard Bore 87.96mm, 13.5:1 Compression engine-crankcase-components-crank-bearings-seals 1987-2004 Yamaha YZ125Bore: 87. 96mm Compression: 13. 5: 1 Compression Sizing: Standard Bore All piston skirts are coated with a hi tech Molybdenum Disulphite coating for faster break in time and increased piston life. Cast Replica piston kits are gravity cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston. Forged Replica pistons are forged from 2618 aluminum for superior strength and durability. Forged High