Bore measurement taken at the bottom of the bore. If you want more photos please ask and Ill send them. The item "Harley Davidson J Model JD Vintage Engine Motor F Part Rare Cylinder Barrel" is in sale since Thursday, July 1, 2021.This item is in the category "Vehicle Parts & Accessories\Motorcycle Parts\Classic, Vintage Parts". The seller is "kinitroptyltd" and is located in Para Hills, SA. This item can be shipped worldwide.