No modification of any kind is required to use this kit. We recommend that this be installed by a qualified mechanic with experience doing this type of work. The item "YFZ450R YFZ 450R 450X 98m 520cc Big Bore Stroker Engine Motor Rebuild Kit Clutch" is in sale since Thursday, November 15, 2018. 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.