{"product_id":"single-fire-programmable-ignition-kit-for-1970-1999-big-twin-evo-53-644-53-660","title":"Single Fire Programmable Ignition Kit For 1970-1999 Big Twin Evo 53-644 53-660","description":"\u003ch2\u003eSingle Fire Programmable Ignition Kit for 1970-1999 Big Twin Evo\u003c\/h2\u003e\u003cp\u003eThis single fire programmable ignition kit replaces the stock ignition module on 1970-1999 Big Twin Evo motorcycles, providing adjustable timing curves and independent cylinder firing. Interchangeable with OEM references 53-644 and 53-660.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis single fire programmable ignition kit is a direct-fit module for 1970-1999 Big Twin Evo engines, swapping out the factory ignition for a tunable timing system. It fires each cylinder on a separate signal for cleaner combustion, steadier idle, and improved throttle response. It suits riders and builders running modified cams, carbureted or EFI-converted Evos, and anyone wanting control over ignition timing.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eProgrammable timing curves allow advance adjustments for stock or built Evo engines\u003c\/li\u003e\n\u003cli\u003eSingle fire design drives each cylinder independently for cleaner fuel burn\u003c\/li\u003e\n\u003cli\u003eDirect replacement footprint for the factory module on 1970-1999 Big Twin Evo models\u003c\/li\u003e\n\u003cli\u003eCross-references OEM part numbers 53-644 and 53-660 for easy verification\u003c\/li\u003e\n\u003cli\u003eSolid-state construction handles vibration and heat on air-cooled V-twin engines\u003c\/li\u003e\n\u003cli\u003eCompatible with stock or aftermarket single fire coils\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Harley-Davidson Big Twin Evo 1970-1999 models\u003c\/li\u003e\n\u003cli\u003efor Big Twin Evo with single fire ignition coil setups\u003c\/li\u003e\n\u003cli\u003efor Big Twin Evo engines using OEM 53-644 or 53-660 ignition modules\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTiming tuning on modified Evo Big Twin engines after cam or exhaust changes\u003c\/li\u003e\n\u003cli\u003eReplacing a failed factory ignition module on 1970-1999 Big Twin Evo bikes\u003c\/li\u003e\n\u003cli\u003eCustom builds running single fire coils for cleaner cylinder firing\u003c\/li\u003e\n\u003cli\u003ePerformance tuning on carbureted or EFI-converted Big Twin Evo powerplants\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e53-644, 53-660\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSingle fire programmable ignition kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1970-1999 Big Twin Evo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProgrammable timing, separate cylinder firing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this kit require a single fire coil? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, it is built for single fire operation and should be paired with a compatible single fire coil so each cylinder fires independently.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e How do I confirm fitment on my Evo? \u003cstrong\u003eA:\u003c\/strong\u003e Match your existing ignition module part number against 53-644 or 53-660, and check year and wiring, since fit can vary across 1970-1999 Big Twin Evo models.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":50553848528982,"sku":"ZZ3M00726","price":255.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_11ba37b4-428d-4180-b8c8-8d4fc559a9f2.jpg?v=1790788301","url":"https:\/\/www.solidspare.com\/products\/single-fire-programmable-ignition-kit-for-1970-1999-big-twin-evo-53-644-53-660","provider":"Solid Spare","version":"1.0","type":"link"}