{"product_id":"ssr-sr125tr-420-15t-20mm-front-sprocket-upgrade","title":"SSR SR125TR 420 15T Front Sprocket – 20mm Upgrade","description":"\u003ch2\u003eSSR SR125TR 420 15T Front Sprocket – 20mm Upgrade\u003c\/h2\u003e\u003cp\u003eBrand-new unbranded 420 pitch, 15-tooth front sprocket for SSR SR125TR applications using the larger 20 mm countershaft pattern.\u003c\/p\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePosition: Front \/ countershaft sprocket\u003c\/li\u003e\n\u003cli\u003eChain pitch: 420\u003c\/li\u003e\n\u003cli\u003eTooth count: 15T\u003c\/li\u003e\n\u003cli\u003eCountershaft family: Large 20 mm type\u003c\/li\u003e\n\u003cli\u003eSpline count: 6\u003c\/li\u003e\n\u003cli\u003eCondition: Brand new\u003c\/li\u003e\n\u003cli\u003eType: Unbranded aftermarket replacement\u003c\/li\u003e\n\u003cli\u003eQuantity: 1 sprocket\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eVerified Fitment Family\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake \/ Engine\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eSSR\u003c\/td\u003e\n\u003ctd\u003eSR125TR \/ SR125TR-BW large-countershaft engine family\u003c\/td\u003e\n\u003ctd\u003eTBolt identifies SSR 125TR with the larger 20 mm shaft; SSR parts data confirms 420 final drive\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eImportant Fitment Information\u003c\/h3\u003e\u003cp\u003eThe SR125TR engine parts schematic lists a 14T countershaft sprocket as standard on documented models. This 15T sprocket should therefore be treated as a gearing change, not an OE-equivalent tooth count.\u003c\/p\u003e\u003cp\u003eMoving from 14T to 15T generally raises the overall final-drive ratio: slightly less acceleration and lower engine rpm at a given road speed, subject to the rest of the gearing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo not order by engine capacity alone.\u003c\/strong\u003e Chinese horizontal engines use more than one countershaft spline size. Many YX\/Piranha engines and several SSR\/Pitster Pro models use the smaller 17 mm pattern, which is not the same as this 20 mm sprocket.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cp\u003eOne 420 pitch, 15-tooth front sprocket. Retainer plate, bolts and other fitting hardware are not stated as included.\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003eConfirm chain pitch, shaft spline size, chain alignment and sprocket-retainer arrangement before fitting. Inspect the drive chain and rear sprocket for wear and replace worn drivetrain components as required.\u003c\/p\u003e","brand":"Unbranded","offers":[{"title":"Default Title","offer_id":57504198787447,"sku":"02103-DNT","price":9.0,"currency_code":"SHP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0528\/8771\/6007\/files\/20260929_110346.jpg?v=1790781474","url":"https:\/\/www.motomaniauk.com\/products\/ssr-sr125tr-420-15t-20mm-front-sprocket-upgrade","provider":"Moto Mania UK","version":"1.0","type":"link"}