{"product_id":"s-s-cycle-conversion-kits-1986-2021-harley-davidson-sportster-models-1","title":"S\u0026S Cycle Conversion Kits — 1986-2021 Harley-Davidson Sportster Models","description":"\u003cp\u003eS\u0026amp;S Cycle 1250cc conversion kit for 1986-2021 Harley-Davidson Sportster models, increasing displacement from 883cc or 1200cc without requiring machine work or piston rebalancing. Kit includes forged 5cc pop-up pistons, S\u0026amp;S 3-9\/16\" bore cylinders, and all gaskets needed for assembly.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eForged 5cc pop-up pistons with coated skirts\u003c\/li\u003e\n  \u003cli\u003eS\u0026amp;S 3-9\/16\" bore cylinders\u003c\/li\u003e\n  \u003cli\u003eComplete gasket set included (MLS head, base, exhaust)\u003c\/li\u003e\n  \u003cli\u003eNo machining or rebalancing required\u003c\/li\u003e\n  \u003cli\u003eAssembly lube and instructions included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e S\u0026amp;S Cycle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 910-0690\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisplacement Increase:\u003c\/strong\u003e 883cc or 1200cc to 1250cc\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePiston Bore:\u003c\/strong\u003e 3-9\/16\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 22.15 lb\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Engine Components \/ Piston Sets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits 1986-2021 Harley-Davidson Sportster models with 883cc or 1200cc engines. 883 cylinder heads are not compatible with this kit.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWill this kit fit my 883 Sportster?\u003c\/h3\u003e\n\u003cp\u003eYes, but you must use a 1200 or newer cylinder head. Original 883 heads are not compatible with this conversion.\u003c\/p\u003e\n\u003ch3\u003eDo I need to have the cylinders bored or pistons rebalanced?\u003c\/h3\u003e\n\u003cp\u003eNo. This kit is pre-machined and balanced — no additional machine work is required.\u003c\/p\u003e\n\u003ch3\u003eWhat's included in the box?\u003c\/h3\u003e\n\u003cp\u003eForged pistons, S\u0026amp;S cylinders, MLS head gasket, base gaskets, exhaust gaskets, assembly lube, and detailed instructions.\u003c\/p\u003e\n\u003ch3\u003eWill this increase my horsepower?\u003c\/h3\u003e\n\u003cp\u003eThe displacement bump adds some power, but S\u0026amp;S recommends pairing it with CNC head porting, performance cams, and exhaust\/intake upgrades for best results.\u003c\/p\u003e\n\u003ch3\u003eIs this a bolt-on upgrade?\u003c\/h3\u003e\n\u003cp\u003eIt requires engine disassembly and reassembly. Professional installation is strongly recommended.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53040423534703,"sku":"T14-662688","price":1077.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_b9b2f66c-9691-4b1b-a833-3db66aa97daa.png?v=1779566478","url":"https:\/\/vtwinbikers.com\/products\/s-s-cycle-conversion-kits-1986-2021-harley-davidson-sportster-models-1","provider":"Vtwinbikers","version":"1.0","type":"link"}