{"product_id":"renthal-131u52051gbsi-ultralight-rear-sprocket-yamaha-moto-house-mx","title":"Renthal Ultralight Rear Sprocket (51T, Silver) 131U-520-51GBSI - Yamaha 125cc-400cc 1986-1998","description":"\u003ch1\u003e\u003cstrong\u003eRenthal Ultralight Rear Sprocket (51T, Silver) 131U-520-51GBSI - Yamaha 125cc-400cc 1986-1998\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eRenthal Ultralight Rear Sprocket\u003c\/strong\u003e is precision-machined to optimize power transfer while reducing unsprung weight on your Yamaha machine. Built for maximum performance on the track, it provides championship-winning reliability.\u003c\/p\u003e\n\u003cp\u003eForged from high-strength 7075-T6 aluminum, this sprocket is significantly lighter than standard steel alternatives. Its advanced tooth profile promotes smooth chain engagement for reduced friction and longer service life.\u003c\/p\u003e\n\u003ch3\u003eTop Features: Renthal Ultralight Rear Sprocket\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCNC-machined with a computer-aided ultra-light design to cut unsprung weight and maximize power transfer\u003c\/li\u003e\n\u003cli\u003eManufactured from specially enhanced 7075-T6 aluminum that is 33% lighter than steel without sacrificing strength\u003c\/li\u003e\n\u003cli\u003eAdvanced tooth profile allows the chain to roll easily on and off for reduced noise and longer wear\u003c\/li\u003e\n\u003cli\u003eEngineered to strict factory tolerances for an exact drivetrain fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.\u003c\/p\u003e\n\u003ch3\u003eFitment List\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"5\" style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eVehicle Brand\u003c\/th\u003e\n\u003cth\u003eVehicle Model \u0026amp; Sub-Model\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1986\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eYZ125\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1993-1998\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eYZ125\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1994-1998\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eYZ250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1997\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eWR250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1998\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eWR 250 \/ WR400F \/ YZ400F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: What chain size is this rear sprocket built for?\u003c\/b\u003e\u003cbr\u003eA: This sprocket is designed to fit a 520 chain size.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Is this sprocket made from steel or aluminum?\u003c\/b\u003e\u003cbr\u003eA: It is constructed from high-strength 7075-T6 aluminum, making it 33% lighter than steel.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eExpert Pro-Tip:\u003c\/b\u003e Always inspect your front sprocket and chain condition whenever replacing your rear sprocket. Installing a new aluminum sprocket onto a heavily worn chain will drastically shorten the lifespan of the component.\u003c\/p\u003e\n\u003ch3\u003eRecommended Pairings:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/motohousemx.com\/collections\/unlock-peak-performance-for-your-yamaha-yz125-high-quality-parts-accessories\"\u003eYamaha YZ125 Performance Parts \u0026amp; Accessories\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/motohousemx.com\/collections\/yamaha-2-stroke-dirt-bikes-performance-parts-accessories-moto-house-mx\"\u003eYamaha 2-Stroke Performance Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/motohousemx.com\/collections\/mx-off-road-chains\"\u003eMX Chains\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAbout Moto-House MX\u003c\/h3\u003e\n\u003cp\u003eAt Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. We pride ourselves on great customer service, and every item ships FAST - straight to your door.\u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\u003cstrong\u003eMoto-House MX - Choice of Champions\u003c\/strong\u003e - Your premier powersports source with great customer service and lightning-fast shipping straight to your door.\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"RENTHAL","offers":[{"title":"Default Title","offer_id":42622537039955,"sku":"131U-520-51GBSI","price":89.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/renthal-rear-ultralight-sprocket-silver-grooved-51t-part-number-131u-520-51gbsi-844473.jpg?v=1744691954","url":"https:\/\/motohousemx.com\/products\/renthal-131u52051gbsi-ultralight-rear-sprocket-yamaha-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}