Vertex 23641A Forged Replica Piston Kit - Standard Bore 87.96mm, 13.5:1 Compression casual-wear-jackets-hoodies and dual sport models with

and dual sport models with a 1-1/8in

up to 1 1/8 - 1 1/2in

ReplacesRing Set O

1988-2001 Yamaha VMX1200 V-Max

1988-1990 Polaris Sport

Vertex 23641A Forged Replica Piston Kit - Standard Bore 87.96mm, 13.5:1 Compression casual-wear-jackets-hoodies and dual sport models withBore: 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