Cylinder and Piston Kits are honed and pre-fitted with pistons. This kit is 9:1 Ratio (stock). They are ready to run and will require breakin. As suggested in the appropriate shop manual. The item "Honed Fitted 1000cc Cylinder & Piston Engine Kit 73-85 Harley Sportster Ironhead" is in sale since Sunday, September 28, 2014.This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Cylinder Barrels". The seller is "americanclassicmotors" and is located in Zieglerville, Pennsylvania. This item can be shipped worldwide.