1250 Cc Conversion Kit

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Product Description Converts '86-'21 883 cc and 1200 cc Sportster models to 1250 cc displacement 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 No machining or rebalancing is required 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 Made in the USA Notes Will not work with XR1200 models. 883 models will require the use of XL1200 cylinder heads to achieve correct compression ratios. For the best performance CNC head porting, performance cams, exhaust and intake upgrades are recommended. Show more