{"product_id":"water-pump-gasket-vespa-gts-250-300-840504-aft","title":"Water Pump Gasket - Vespa GTS 250\/300","description":"\u003ch3\u003ePremium Right Crankcase Water Pump Gasket\u003c\/h3\u003e\u003cp\u003eDon’t let a weeping coolant leak risk an expensive engine overheat. This premium aftermarket right-side crankcase cover gasket—commonly referred to as the water pump casing gasket—seals the critical mating surface where your water pump assembly integrates into the engine block. Engineered to replace brittle or blown factory seals, it locks fluid passages down tight to keep your engine oil and engine coolant safely separated.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003ePrevents Fluid Mixing:\u003c\/b\u003e Creates a high-pressure barrier that stops coolant from bleeding across internal passages into your engine’s oil supply.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eExcellent Thermal Resilience:\u003c\/b\u003e Formulated from specialized aramid-fiber gasket material that won’t shrink, crack, or degrade under extreme cooling system cycling.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003ePrecision Die-Cut Alignment:\u003c\/b\u003e Stamped with absolute precision to line up perfectly with every alignment dowel and bolt hole on the right engine casing.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eDirect OEM Interchange:\u003c\/b\u003e Matches the dimensional profile and sealing thickness of original factory part number 840504 exactly.\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; HPE Liquid-Cooled Engines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eVespa\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eGT 200 \/ Granturismo\u003c\/td\u003e\n\u003ctd\u003e200cc Liquid-Cooled Leader Engine\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 \/ BV 350\u003c\/td\u003e\n\u003ctd\u003e250cc, 300cc \u0026amp; 350cc Liquid-Cooled Engines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003ePiaggio\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eMP3 250 \/ 300\u003c\/td\u003e\n\u003ctd\u003e250cc \u0026amp; 300cc Three-Wheel Models\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 Liquid-Cooled Quasar 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 840504, 484793\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eComponent Type:\u003c\/b\u003e Right Crankcase Cover \/ Water Pump Housing Gasket\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eMaterial Composition:\u003c\/b\u003e High-density, oil-and-coolant resistant aramid fiber compound\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003eThickness:\u003c\/b\u003e Factory-matched standard clearance thickness\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cb\u003ePackage Contents:\u003c\/b\u003e (1) Replacement Crankcase Cover Gasket\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cblockquote\u003e\n\u003cp style=\"text-align: left;\"\u003eMaintenance Note:\u003cstrong\u003e If you notice a milky, latte-like substance underneath your oil filler cap, or if your coolant levels are dropping mysteriously without a puddle on the floor, your right case gasket or internal mechanical water pump seal has failed. Continued riding with water-contaminated oil will rapidly destroy your engine’s crankshaft bearings.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eInstallation Tip:\u003cstrong\u003e Thoroughly clean the old aluminum casing surfaces before installing the new gasket. Use a plastic scraper and brake cleaner to remove any baked-on factory paper or sealant residue—never use a metal razor blade, as even a tiny gouge in the soft aluminum will create a permanent leak path.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003ePro Tip:\u003cstrong\u003e While this paper gasket seals the outer cover plate, it does not stop leaks originating from the spinning water pump impeller shaft itself. If you are going through the effort of tearing down the right engine cover, it is highly recommended to inspect and replace the internal mechanical oil\/water seals at the same time to avoid doing the job twice.\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":50895812755736,"sku":"840504-AFT","price":8.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/files\/840504-AFT.webp?v=1771965287","url":"https:\/\/www.scooterworks.com\/products\/water-pump-gasket-vespa-gts-250-300-840504-aft","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}