BIG BORE KIT +3MM YZ450F '03-05 WR450F '03-06

$579.95

$716.95

You save $137 (19%)

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All piston skirts are coated with a hi-tech Molybdenum Disulphite coating for faster break-in time and increased piston life
Forged Big Bore pistons increase engines displacement, torque, and peak horsepower
All pistons are heat treated with a T-5 hardening and tempering cycle
Kits include piston, rings, wrist pin and circlips