We recommend that this kit be installed by a qualified mechanic with experience working on these types of motors. Piston comes with specific instructions for setting the ring gap.
If you do not follow these exactly your motor will fail. The item "02-08 CRF450R CRF 450R Engine Motor Rebuild Kit Complete Crank Top Bottom Clutch" is in sale since Thursday, August 16, 2018. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Big Bore & Top End Kits". The seller is "bpracingatv" and is located in Upland, California.This item can be shipped worldwide.