CYLINDER KT 1250 SLV 10.3

No machining or rebalancing is required Converts '86-'21 883 cc and 1200 cc Sportster models to 1250 cc displacement For the best performance CNC head porting, performance cams, exhaust and intake upgrades are recommended. Will not work with XR1200 models. 883 models will require the use of XL1200 cylinder heads to achieve correct compression ratios. Made in the USA Kit includes S&S 1250 cc pistons with rings and wristpins, S&S 3-9/16" bore cylinders, MLS (Multi-Layer Steel) head, base and exhaust gaskets, assembly lube and instructions Forged pistons have larger than stock valve pockets and accepts up to 2.00" valves Forged pistons - coated piston skirts with measurement window and S&S logo