{"title":"Milwaukee-Eight Engines","description":"\u003cp\u003e\u003ca href=\"\/collections\/engines\"\u003e← Back to Engines categories\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003eM8 crate engines for compatible Touring and Softail applications. Check each engine’s exact year, cooling system, and installation requirements.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/collections\/engines\" style=\"color:#1565c0\"\u003eView all engines and installation kits\u003c\/a\u003e\u003c\/p\u003e","products":[{"product_id":"s-s-cycle-mk136-black-edition-engine-with-550g-cam-2017-2023-m8-touring-oil-cooled-race-only","title":"S\u0026S Cycle MK136 Black Edition Engine with 550G Cam — 2017–2023 M8 Touring, Oil-Cooled — Race Only","description":"\u003cp\u003eS\u0026amp;S Cycle MK136 Black Edition engine with a 550G gear-drive cam for compatible 2017–2023 Harley-Davidson Milwaukee-Eight Touring models with oil cooling.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh-flow cylinder heads with premium seats, guides, valves, springs, and seals\u003c\/li\u003e\n\u003cli\u003eIntake and exhaust valves oversized by 1 mm; valves 0.030 inch longer than stock for improved valvetrain geometry\u003c\/li\u003e\n\u003cli\u003eValve springs support a maximum lift of 0.605 inch\u003c\/li\u003e\n\u003cli\u003eHigh-strength alloy cylinder-head castings and enlarged exhaust-seat cooling passages\u003c\/li\u003e\n\u003cli\u003eS\u0026amp;S breather boxes and MK136 forged pistons\u003c\/li\u003e\n\u003cli\u003eS\u0026amp;S performance oil pump and cam support plate\u003c\/li\u003e\n\u003cli\u003ePremium tappets and tappet cuffs\u003c\/li\u003e\n\u003cli\u003eBillet aluminum covers, sprocket-shaft spacer, Champion spark plugs, and cam-cover badge\u003c\/li\u003e\n\u003cli\u003eRetains stock engine height; powder-coat finish matches the factory finish\u003c\/li\u003e\n\u003cli\u003eDual-Spray Piston Cooling Jets, precision-machined oil scraper, enlarged oil sump, and contoured crankcase floor\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFuel and ignition systems are not included.\u003c\/strong\u003e Confirm exact motorcycle compatibility and installation requirements with JL Customs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRestrictions:\u003c\/strong\u003e Race use only. This engine is not legal for sale or use in California on pollution-controlled motor vehicles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Contact JL Customs to confirm freight charges and delivery requirements before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarning:\u003c\/strong\u003e This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.\u003c\/p\u003e\u003cp\u003eListed with a one-year warranty.Part number: 310-1289.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50626102427787,"sku":"310-1289","price":11999.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/9816\/4363\/files\/IMG-0105.webp?v=1791667514"},{"product_id":"s-s-cycle-mk136-engine-with-550g-cam-2018-2024-m8-softail-race-only","title":"S\u0026S Cycle MK136B Engine with 550G Cam — 2018–2024 M8 Softail — Race Only","description":"\u003cp\u003eS\u0026amp;S Cycle MK136B crate engine with a 550G cam for compatible 2018–2024 Harley-Davidson Milwaukee-Eight Softail models. This engine is intended for race use only.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMKB-series crankcases with 136-cubic-inch cylinders and flywheels\u003c\/li\u003e\n\u003cli\u003eHigh-flow cylinder heads with premium seats, guides, valves, springs, and seals\u003c\/li\u003e\n\u003cli\u003eIntake and exhaust valves oversized by 1 mm and 0.030 inch longer than stock\u003c\/li\u003e\n\u003cli\u003eValve springs support 0.605-inch maximum lift\u003c\/li\u003e\n\u003cli\u003eHigh-strength alloy cylinder heads and S\u0026amp;S breather boxes\u003c\/li\u003e\n\u003cli\u003eDual-Spray Piston Cooling Jets, precision-machined oil scraper, enlarged oil sump, and contoured crankcase floor\u003c\/li\u003e\n\u003cli\u003eForged pistons, S\u0026amp;S performance oil pump and cam support plate\u003c\/li\u003e\n\u003cli\u003ePremium tappets and tappet cuffs; billet aluminum covers\u003c\/li\u003e\n\u003cli\u003eSprocket-shaft spacer, Champion spark plugs, and cam-cover badge included\u003c\/li\u003e\n\u003cli\u003eRetains stock engine height; powder-coat finish matches factory finish\u003c\/li\u003e\n\u003cli\u003eone-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eConfirm exact motorcycle fitment and installation requirements with JL Customs before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Contact JL Customs to confirm freight charges and delivery requirements before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRestrictions:\u003c\/strong\u003e Race use only. This engine is not legal for sale or use in California on pollution-controlled motor vehicles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarning:\u003c\/strong\u003e This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.\u003c\/p\u003e\u003cp\u003ePart number: 310-1295.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50626374434955,"sku":"310-1295","price":12499.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/9816\/4363\/files\/IMG-0113.webp?v=1791668714"},{"product_id":"s-s-cycle-mk136-black-edition-engine-2017-2023-oil-cooled-m8-touring-310-1290","title":"S\u0026S Cycle MK136 Black Edition Engine — 2017–2023 Oil-Cooled M8 Touring — 310-1290","description":"\u003cp\u003eS\u0026amp;S Cycle MK136 Black Edition engine with a 550G gear-drive cam for compatible 2017–2023 Harley-Davidson Milwaukee-Eight Touring models with oil cooling. Part 310-1290 is listed as the 49-state emissions-compliant version. Confirm applicable certification, installation conditions, and exact motorcycle compatibility with the manufacturer before purchase.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh-flow cylinder heads with premium seats, guides, valves, springs, and seals\u003c\/li\u003e\n\u003cli\u003eIntake and exhaust valves oversized by 1 mm and 0.030 inch longer than stock\u003c\/li\u003e\n\u003cli\u003eValve springs support 0.605-inch maximum lift\u003c\/li\u003e\n\u003cli\u003eHigh-strength alloy cylinder heads with enlarged exhaust-seat cooling passages\u003c\/li\u003e\n\u003cli\u003eS\u0026amp;S breather boxes and forged pistons\u003c\/li\u003e\n\u003cli\u003eS\u0026amp;S performance oil pump and cam support plate\u003c\/li\u003e\n\u003cli\u003ePremium tappets and tappet cuffs; billet aluminum covers\u003c\/li\u003e\n\u003cli\u003eSprocket-shaft spacer, Champion spark plugs, and cam-cover badge included\u003c\/li\u003e\n\u003cli\u003eRetains stock engine height; powder-coat finish matches factory finish\u003c\/li\u003e\n\u003cli\u003eDual-Spray Piston Cooling Jets, precision-machined oil scraper, enlarged oil sump, and contoured crankcase floor\u003c\/li\u003e\n\u003cli\u003eone-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFuel and ignition systems are not included.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Contact JL Customs to confirm freight charges and delivery requirements before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRestrictions:\u003c\/strong\u003e This engine is not legal for sale or use in California on pollution-controlled motor vehicles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarning:\u003c\/strong\u003e This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.\u003c\/p\u003e\u003cp\u003ePart number: 310-1290.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50626611675275,"sku":"310-1290","price":11999.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/9816\/4363\/files\/IMG-0139.webp?v=1791669505"},{"product_id":"s-s-cycle-mk136b-black-edition-engine-2018-2020-m8-softail-310-1296","title":"S\u0026S Cycle MK136B Black Edition Engine — 2018–2020 M8 Softail — 310-1296","description":"\u003cp\u003eS\u0026amp;S Cycle MK136B Black Edition crate engine for compatible 2018–2020 Harley-Davidson Milwaukee-Eight Softail models. Part 310-1296 is listed as the 49-state version. Confirm applicable certification, installation conditions, and exact motorcycle compatibility with the manufacturer before purchase.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMKB-series crankcases with 136-cubic-inch cylinders and flywheels\u003c\/li\u003e\n\u003cli\u003eHigh-flow cylinder heads with premium seats, guides, valves, springs, and seals\u003c\/li\u003e\n\u003cli\u003eIntake and exhaust valves oversized by 1 mm and 0.030 inch longer than stock\u003c\/li\u003e\n\u003cli\u003eValve springs support 0.605-inch maximum lift\u003c\/li\u003e\n\u003cli\u003eHigh-strength alloy cylinder heads and S\u0026amp;S breather boxes\u003c\/li\u003e\n\u003cli\u003eDual-Spray Piston Cooling Jets, precision-machined oil scraper, enlarged oil sump, and contoured crankcase floor\u003c\/li\u003e\n\u003cli\u003eForged pistons and S\u0026amp;S performance oil pump and cam support plate\u003c\/li\u003e\n\u003cli\u003ePremium tappets and tappet cuffs; billet aluminum covers\u003c\/li\u003e\n\u003cli\u003eSprocket-shaft spacer, Champion spark plugs, and cam-cover badge included\u003c\/li\u003e\n\u003cli\u003eRetains stock engine height; powder-coat finish matches factory finish\u003c\/li\u003e\n\u003cli\u003eone-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Contact JL Customs to confirm freight charges and delivery requirements before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRestrictions:\u003c\/strong\u003e This engine is not legal for sale or use in California on pollution-controlled motor vehicles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWarning:\u003c\/strong\u003e This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.\u003c\/p\u003e\u003cp\u003ePart number: 310-1296.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":50626627928203,"sku":"310-1296","price":12499.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/9816\/4363\/files\/IMG-0141.webp?v=1791669583"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/9816\/4363\/collections\/jl-category-milwaukee-eight-engines.png?v=1793753367","url":"https:\/\/jlcustom.net\/collections\/milwaukee-eight-engines.oembed","provider":"JL Customs","version":"1.0","type":"link"}