{"product_id":"harddrive-regulator-big-twin-blk-1981-1988-oem-74516-86-820-60126","title":"Harddrive Regulator - BIG Twin BLK `1981-1988 OEM 74516-86 — Harley-Davidson Softail Heritage Classic, Softail Fat Boy, Electra Glide (1955-2026)","description":"\u003cp\u003eHarddrive regulator for Big Twin V-twin engines, 1981–1988 models. Built to OEM 74516-86 specifications with sealed high-temperature encapsulation and SCR (Silicon Controlled Rectifier) technology for cooler, more efficient charging system operation.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMeets\/exceeds OEM specifications\u003c\/li\u003e\n  \u003cli\u003eSilicon Controlled Rectifier (SCR) technology for cooler operation\u003c\/li\u003e\n  \u003cli\u003eSealed high-temperature encapsulation\u003c\/li\u003e\n  \u003cli\u003eSurface-mount circuit board design minimizes thermal impedance\u003c\/li\u003e\n  \u003cli\u003eOEM-grade high-temperature wiring harness\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 Harddrive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e H1686\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Part Reference:\u003c\/strong\u003e 74516-86\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 191361170041\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 5.2 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 5.1 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 3.3 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.85 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e China (Mainland)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson Big Twin V-twin models, 1981–1988 model years with OEM charging systems.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the OEM equivalent part number?\u003c\/h3\u003e\n\u003cp\u003eThis Harddrive regulator meets OEM Harley-Davidson part number 74516-86 specifications.\u003c\/p\u003e\n\u003ch3\u003eWill this fit my 1979 Big Twin?\u003c\/h3\u003e\n\u003cp\u003eThis part is for 1981–1988 Big Twin models. Older 1979–1980 Harleys use a different regulator design.\u003c\/p\u003e\n\u003ch3\u003eWhy does this regulator run cooler than stock?\u003c\/h3\u003e\n\u003cp\u003eThe SCR (Silicon Controlled Rectifier) circuit and sealed surface-mount board design conducts heat more efficiently, reducing thermal strain on the charging system.\u003c\/p\u003e\n\u003ch3\u003eIs this a direct bolt-on replacement?\u003c\/h3\u003e\n\u003cp\u003eYes — it uses the OEM-grade wiring harness and mounts in place of the original regulator with no modifications required.\u003c\/p\u003e","brand":"Harddrive","offers":[{"title":"Default Title","offer_id":53035440963695,"sku":"820-60126","price":189.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/5ef5-59de3d3778ec1.jpg?v=1777528608","url":"https:\/\/vtwinbikers.com\/products\/harddrive-regulator-big-twin-blk-1981-1988-oem-74516-86-820-60126","provider":"Vtwinbikers","version":"1.0","type":"link"}