{"product_id":"rms-voltage-regulator-vespa-gts-250-300","title":"Voltage Regulator - Vespa GTS 250\/300","description":"\u003cp\u003eAn aftermarket voltage regulator rectifier from for Vespa GTS 250\/300, Piaggio BV\/MP3\/Beverly, and Aprilia Atlantic\/SportCity models running Quasar 250–300cc engines. Converts AC output from the stator into stable 14.5V DC, protecting the battery and electrical system from overcharging spikes and undercharging dropouts. Features a die-cast aluminum finned heat sink for thermal management and includes OEM-matched connectors for a plug-in installation. Replaces OEM part numbers 641709, 639110, and 58115R.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRegulated 14.5V DC output — matches OEM voltage tolerance\u003c\/li\u003e\n\u003cli\u003eDie-cast aluminum finned heat sink for heat dissipation\u003c\/li\u003e\n\u003cli\u003eOEM-matched connector harness — plug-in installation, no splicing\u003c\/li\u003e\n\u003cli\u003eProtects battery from overcharging and undercharging\u003c\/li\u003e\n\u003cli\u003eReplaces OEM 641709, 639110, 58115R\u003c\/li\u003e\n\u003cli\u003eSKU: 641709-AFT\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRegulated 14.5V DC output — matches OEM voltage tolerance\u003c\/li\u003e\n\u003cli\u003eDie-cast aluminum finned heat sink for heat dissipation\u003c\/li\u003e\n\u003cli\u003eOEM-matched connector harness — plug-in installation, no splicing\u003c\/li\u003e\n\u003cli\u003eProtects battery from overcharging and undercharging\u003c\/li\u003e\n\u003cli\u003eReplaces OEM 641709, 639110, 58115R\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOutput Voltage: 14.5V DC (regulated)\u003c\/li\u003e\n\u003cli\u003eType: Shunt-type voltage regulator rectifier\u003c\/li\u003e\n\u003cli\u003eHousing: Die-cast aluminum heat sink with sealed epoxy potting\u003c\/li\u003e\n\u003cli\u003eReplaces OEM: 641709, 639110, 58115R\u003c\/li\u003e\n\u003cli\u003eSKU: 641709-AFT\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVespa\u003c\/td\u003e\n\u003ctd\u003eGTS 250 \/ GTS 300 \/ GTS Super \/ GTV\u003c\/td\u003e\n\u003ctd\u003eQuasar 250–300cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiaggio\u003c\/td\u003e\n\u003ctd\u003eBV 250 \/ BV 300\u003c\/td\u003e\n\u003ctd\u003eQuasar 250–300cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiaggio\u003c\/td\u003e\n\u003ctd\u003eMP3 250 \/ MP3 300\u003c\/td\u003e\n\u003ctd\u003eQuasar 250–300cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiaggio\u003c\/td\u003e\n\u003ctd\u003eBeverly 300 \/ Beverly 350\u003c\/td\u003e\n\u003ctd\u003eFuel-injected maxi-scooter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAprilia\u003c\/td\u003e\n\u003ctd\u003eAtlantic 250\u003c\/td\u003e\n\u003ctd\u003eQuasar 250cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAprilia\u003c\/td\u003e\n\u003ctd\u003eSportCity 250 \/ SportCity 300\u003c\/td\u003e\n\u003ctd\u003eQuasar 250–300cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation note:\u003c\/strong\u003e Ensure clean metal-to-metal contact at the chassis mounting point — the regulator body requires a solid chassis ground to dissipate excess voltage. Before replacing, verify the stator output and wiring harness are in good condition, as a faulty stator can damage a new regulator.\u003c\/p\u003e\u003cp\u003eCalifornia Prop 65 Warning: www.p65warnings.ca.gov\u003c\/p\u003e","brand":"RMS","offers":[{"title":"Default Title","offer_id":67964777627969,"sku":"641709-AFT","price":99.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/641709-AFT_7b28c602-9bee-4a6c-a799-f7e79b0fb98a.webp?v=1792993068","url":"https:\/\/azscooterparts.com\/products\/rms-voltage-regulator-vespa-gts-250-300","provider":"AZScooterParts","version":"1.0","type":"link"}