2000-08 Yamaha Yfm400 10.5:1cr85.5mm

forged from high-silicon aluminum alloy for maximum strength and dependability.

innovative forging design and piston skirt provide maximum horsepower and torque.

wiseco high-performance piston kits are priced with piston, rings, pins and circlips (unless noted otherwise).

oversize pistons require cylinder sleeving.