Yamaha YFZ450S Quad ATV 04-09 Vertex Piston Kit (STD) 12:1 Compression

• All pistons are heat-treated with a T-5 hardening and tempering cycle; piston skirts are coated with a high-tech molybdenum bisulphite for faster break-in time and increased piston life
• Piston kits include piston, rings, wrist pin and circlips
• Standard pistons and rings are OEM replacements
• Two-stroke piston kits made from gravity cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston
• four-stroke pistons are forged from 2618 aluminum for superior strength and durability
• High compression pistons improve power and torque across entire rpm range
• Big bore pistons increase engine's displacement, torque and peak horsepower
• Diameter (MM) - 94.95
• Oversize (MM) - STD