MOOSE RACING Piston Kit M3023C Quantum-X Helmet Interior Pad — S Yamaha YZ400F 1998-1999

Yamaha YZ400F 1998-1999

This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference informatio

the duct is open

the needle and clip positions and the main jet The Fi2000R increases horsepower and torque by optimizing stock lean air/fuel mixtures (helps cool the engine temps as well) Pre-configured from the factory for your make and model

MOOSE RACING Piston Kit M3023C Quantum-X Helmet Interior Pad — S Yamaha YZ400F 1998-1999Moose Racing pistons feature X style forgings and fully boxed style (race pistons) forgings for ultimate strength, minimizing friction, durability, power, and weight reduction Pro Race Piston increases the durability by reducing the stresses in the pin bore area Pro Race Piston allows the pin to flex while removing stress from the area Full radius dome designs maximize quench while eliminating hot spots that promote detonation Internal bracing