Yamaha YFZ450 Quad ATV Big Bore Kit

Yamaha YFZ 450 big bore kit, 98mm, +3mm oversize, complete kit includes Wiseco Piston with coated skirts, Piston Pin, Piston Rings, Pin Locks, Top End Gasket Kit and a new Cylinder. Fits 2204 - 2009 models. 12-1 comp. Builds a 2004-2005 model to 468cc and a 2006 and newer to 478cc

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