99mm big bore nikasil cylinder. 12.5:1 piston kit. This is a bolt on kit with no machining required.
Piston uses pump or race gas. We recommend that this be installed by a qualified mechanic with experience doing this type of work. The item "06+ TRX450R TRX 450R 450ER 99mm 510cc CP Hotrods Big Bore Stroker Motor Kit" is in sale since Monday, April 24, 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.