FITS ALL YAMAHA YFZ450 MODELS AND YEARS CARB MODEL ONLY! 98mm REDESIGNED big bore cylinder. 12.8:1 Wiseco forged piston. We recommend that this be installed by a qualified mechanic with experience doing this type of work. The item "YFZ450 YFZ 450 98mm 478 CP 13.51 Stage 3 Hotcams Big Bore Top End Rebuild Kit" is in sale since Wednesday, July 5, 2017.This item is in the category "eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Components". The seller is "bpracingatv" and is located in Upland, California. This item can be shipped worldwide.