{"product_id":"voltage-regulator-vespa-gts-250-300-641709-aft","title":"Voltage Regulator - Vespa GTS 250\/300","description":"\u003ch3\u003ePremium Vespa GTS Voltage Regulator\u003c\/h3\u003e\u003cp\u003eStop letting a failing charging system cook your expensive battery or blow out your digital dashboard. This premium aftermarket voltage regulator rectifier acts as the critical gatekeeper of your scooter's electrical system, converting raw, erratic alternating current (A.C.) from the stator into stable, controlled direct current (D.C.). Engineered to match strict OEM voltage tolerances, it eliminates flickering headlights, dead batteries, and erratic idle dropouts.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eOEM-Spec Voltage Management:\u003c\/b\u003e Prevents damaging electrical spikes by capping system output to a steady, factory-regulated 14.5V range.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eHeavy-Duty Aluminum Heat Sink:\u003c\/b\u003e Cast with deep cooling fins to rapidly dissipate internal heat, preventing the thermal burnout that plagues factory units.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003ePlug-and-Play Wiring Harness:\u003c\/b\u003e Includes the correct factory-matched connector block for a clean, secure hookup with no wire cutting or splicing.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eOvercharging Protection:\u003c\/b\u003e Advanced internal circuitry isolates your battery from high-RPM stator surges, significantly extending battery lifespan.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment Guide\u003c\/h3\u003e\u003cdiv class=\"horizontal-scroll-wrapper\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine Compatibility\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eVespa\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eGTS 250 \/ 300 \/ Super \/ GTV\u003c\/td\u003e\n\u003ctd\u003eQuasar 250cc–300cc \u0026amp; Early HPE Generations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003ePiaggio\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eBV 250 \/ BV 300 \/ MP3 250 \u0026amp; 300\u003c\/td\u003e\n\u003ctd\u003e250cc–300cc Fuel-Injected Quasar Engines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003ePiaggio\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eBeverly 300 \/ 350\u003c\/td\u003e\n\u003ctd\u003eFuel-Injected Maxi-Scooter Variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eAprilia\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eAtlantic 250 \/ SportCity 250 \u0026amp; 300\u003c\/td\u003e\n\u003ctd\u003eAll Quasar Engine Configurations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eTechnical Specs\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eManufacturer Part Reference:\u003c\/b\u003e High-Quality Aftermarket \/ Replaces OEM 641709, 639110, 58115R\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eComponent Type:\u003c\/b\u003e Shunt-type Voltage Regulator Rectifier\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eOutput Voltage:\u003c\/b\u003e 14.5V D.C. regulated standard nominal output\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eHousing Material:\u003c\/b\u003e Die-cast aluminum heat sink with sealed epoxy potting\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003ePackage Contents:\u003c\/b\u003e (1) Replacement Voltage Regulator Rectifier Assembly\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cblockquote\u003e\n\u003cp style=\"text-align: left;\"\u003eMaintenance Note:\u003cstrong\u003e A voltage regulator usually fails in one of two ways: it undercharges (battery drains down below 12V while riding), or it overcharges (voltage spikes past 15V, boiling the battery acid and blowing bulbs). If you notice a sulfur “rotten egg” smell under your seat, your regulator is dangerously overcharging.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eInstallation Tip\u003cstrong\u003e: Clean, metal-to-metal contact is vital when bolting the new regulator to the scooter chassis. The regulator body needs a solid chassis ground to bleed off excess voltage safely; clean off any road grime or corrosion from the frame mounting tab before tightening the bolts.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003ePro Tip:\u003cstrong\u003e Before condemning your old regulator, always pull your stator cover plug and check the three yellow stator wires for continuity and grounding dropouts. A partially melted stator wire loom will mimic a bad regulator and can rapidly ruin your brand-new replacement unit if left unfixed!\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e \u003ca href=\"https:\/\/www.P65Warnings.ca.gov\" target=\"_blank\" title=\"California Proposition 65\" rel=\"noopener\"\u003eCalifornia Proposition 65\u003c\/a\u003e \u003c\/p\u003e","brand":"RMS","offers":[{"title":"Default Title","offer_id":50895812198680,"sku":"641709-AFT","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/files\/641709-AFT.webp?v=1771965359","url":"https:\/\/www.scooterworks.com\/products\/voltage-regulator-vespa-gts-250-300-641709-aft","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}