{"product_id":"s-s-cycle-conversion-kits-1986-2021-harley-davidson-sportster-models","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, upgrading 883cc or 1200cc engines to 1250cc displacement without requiring machine work or piston rebalancing. Kit includes forged pop-up pistons, S\u0026amp;S cylinders, gaskets, assembly lube, and instructions.\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 (head, base, exhaust)\u003c\/li\u003e\n  \u003cli\u003eNo machining or rebalancing required\u003c\/li\u003e\n  \u003cli\u003eAssembly lube and detailed 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 910-0692\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 22.75 lb\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Engine Components \/ Piston Sets - Powersports\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits 1986-2021 Harley-Davidson Sportster models. 883 cylinder heads are not compatible with this kit and must be replaced.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eDoes this kit require machine work or piston balancing?\u003c\/h3\u003e\n\u003cp\u003eNo — the kit is engineered for direct installation without machining or rebalancing.\u003c\/p\u003e\n\u003ch3\u003eCan I use my stock 883 cylinder head with this kit?\u003c\/h3\u003e\n\u003cp\u003eNo — 883 cylinder heads are not compatible. You must use a 1200 head or later-model Sportster head.\u003c\/p\u003e\n\u003ch3\u003eWhat gaskets are included?\u003c\/h3\u003e\n\u003cp\u003eHead gaskets, base gaskets, exhaust gaskets, plus assembly lube and full installation instructions.\u003c\/p\u003e\n\u003ch3\u003eWhat else should I upgrade for best performance?\u003c\/h3\u003e\n\u003cp\u003eS\u0026amp;S recommends pairing the kit with CNC head porting, performance cams, exhaust, and intake upgrades to maximize power gains.\u003c\/p\u003e\n\u003ch3\u003eWill this kit fit my 1986-1990 Sportster?\u003c\/h3\u003e\n\u003cp\u003eYes — this kit is designed to fit all Sportster models from 1986 through 2021.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53040423501935,"sku":"T14-662687","price":1008.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_932c502f-8f0b-46d7-bfd5-19988e8d9da1.png?v=1779567223","url":"https:\/\/vtwinbikers.com\/products\/s-s-cycle-conversion-kits-1986-2021-harley-davidson-sportster-models","provider":"Vtwinbikers","version":"1.0","type":"link"}