{"product_id":"vortex-rear-sprocket-steel-style-642a-520","title":"Vortex Rear Sprocket, Steel, Style 642A (520)","description":"\u003c!-- isbk-recipe --\u003e\n\u003cp\u003eSprockets set your gearing. One tooth fewer at the front, or a couple more at the rear, makes the bike pull harder out of corners and lifts the front sooner, at the cost of top speed and higher revs on the highway. Going the other way calms it down. Worn sprockets have hooked or pointed teeth and will wear out a new chain quickly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFits as a 520 conversion on the Yamaha YZF-R6\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMade from carbon steel and electroplated with a satin black finish that resists corrosion\u003c\/li\u003e\n  \u003cli\u003eTeeth are hardened so sprocket will hold up to many miles, without affecting strength\u003c\/li\u003e\n  \u003cli\u003eCupped down from tooth ring to body to reduce as much weight as possible\u003c\/li\u003e\n  \u003cli\u003eModel-specific: check the fitment list for your bike\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFits\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBike\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eStock gearing (front \/ rear)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha YZF-R6 \u003cem\u003e(520 conversion)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1999–2002\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003csmall\u003eEvery tooth count of this rear sprocket fits the bikes above. Choose the stock count to keep your gearing, or a different one to change it.\u003c\/small\u003e\u003c\/p\u003e\n\u003cp\u003e\u003csmall\u003eA bike marked (520 conversion) takes this sprocket only once its final drive is converted to 520 chain, with a matching front sprocket and chain.\u003c\/small\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eChanging tooth counts changes your speedometer reading on most bikes, and may need a different chain length. Replace sprockets and chain together.\u003c\/em\u003e\u003c\/p\u003e\n\u003c!-- \/isbk-recipe --\u003e","brand":"Vortex","offers":[{"title":"43T","offer_id":51038282449135,"sku":"642AS-43","price":48.41,"currency_code":"USD","in_stock":true},{"title":"48T","offer_id":51038282481903,"sku":"642AS48","price":56.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/2016\/3567\/files\/image_0_0_f96b4f6d-f7cb-4a3a-821b-d63e09da4654.png?v=1791906155","url":"https:\/\/indysbk.com\/products\/vortex-rear-sprocket-steel-style-642a-520","provider":"Indy Superbikes","version":"1.0","type":"link"}