{"product_id":"compufire-40a-3-phase-charging-system-40-amp-non-vented-1981-1999-bt-evo-139-10024","title":"Compufire 40A 3 Phase Charging System - 40 AMP NON Vented `1981-1999 BT\/EVO — Harley-Davidson (1981-1999)","description":"\u003cp\u003eCompufire 40A 3-phase charging system for Big Twin and EVO Harley engines, delivering 25 amps at idle and 40 amps above 2800 rpm. Made in the USA with a vented rotor for heat dissipation and high-output voltage regulator set to 14.25V from idle.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e40 AMP output above 2800 rpm\u003c\/li\u003e\n  \u003cli\u003e25 AMP output at idle\u003c\/li\u003e\n  \u003cli\u003eVented rotor for heat dissipation\u003c\/li\u003e\n  \u003cli\u003eHigh-output voltage regulator (14.25V from idle)\u003c\/li\u003e\n  \u003cli\u003eMade in the USA\u003c\/li\u003e\n  \u003cli\u003eCompatible with OEM primary due to narrow rotor and stator profile\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 Compufire\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 55570\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 694342548087\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e 25A idle \/ 40A above 2800 rpm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Regulator:\u003c\/strong\u003e 14.25V from idle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 11 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits 1981-1999 Harley Big Twin and EVO engines in Softail, Dyna, and FLT models with OEM primary.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWill this fit my 1981-1999 Harley Softail, Dyna, or FLT?\u003c\/h3\u003e\n\u003cp\u003eYes — this system is designed for those chassis with OEM primary cases. The narrow rotor and stator profile ensure fitment without modifications.\u003c\/p\u003e\n\u003ch3\u003eWhat's the output at idle versus cruising speed?\u003c\/h3\u003e\n\u003cp\u003eThis system produces 25 amps at idle and builds to 40 amps once you exceed 2800 rpm, keeping your battery charged in all conditions.\u003c\/p\u003e\n\u003ch3\u003eDoes the vented rotor help with reliability?\u003c\/h3\u003e\n\u003cp\u003eYes — the vented rotor design improves heat dissipation, keeping the stator cooler and allowing the system to sustain maximum output longer.\u003c\/p\u003e\n\u003ch3\u003eIs this system made overseas?\u003c\/h3\u003e\n\u003cp\u003eNo — Compufire manufactures this 40A system in the USA.\u003c\/p\u003e","brand":"Compufire","offers":[{"title":"Default Title","offer_id":53035872452719,"sku":"139-10024","price":613.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/d49d-5dea7fc3d5e34.jpg?v=1777529918","url":"https:\/\/vtwinbikers.com\/products\/compufire-40a-3-phase-charging-system-40-amp-non-vented-1981-1999-bt-evo-139-10024","provider":"Vtwinbikers","version":"1.0","type":"link"}