{"product_id":"front-track-drive-sprocket-for-ski-doo-blizzard-640-645-776-797-1970-1971","title":"Front Track Drive Sprocket for Ski-Doo Blizzard 640 645 776 797 1970-1971","description":"\u003ch2\u003eFront Track Drive Sprocket for Ski-Doo Blizzard\u003c\/h2\u003e\u003cp\u003eThis front track drive sprocket is a replacement driveline component for 1970-1971 Ski-Doo Blizzard models including the 640, 645, 776, and 797, transferring power from the drive axle to the track.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe front track drive sprocket is the toothed drive wheel that engages the track and turns engine power into forward motion on the snow. Made for vintage Ski-Doo Blizzard machines from 1970 through 1971, including the 640, 645, 776, and 797, this sprocket replaces a worn or damaged original so the track bites and drives as it should. It suits vintage snowmobile restorers and riders keeping a classic Blizzard on the trail.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eToothed profile built to engage the internal lugs of the Blizzard track\u003c\/li\u003e\n\u003cli\u003eDirect replacement for a stripped or broken front drive sprocket\u003c\/li\u003e\n\u003cli\u003eMounts on the front drive axle in the original position\u003c\/li\u003e\n\u003cli\u003eRestores positive track drive under acceleration and load\u003c\/li\u003e\n\u003cli\u003eSized to the driveline of 1970-1971 Blizzard models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Ski-Doo Blizzard 640 1970-1971\u003c\/li\u003e\n\u003cli\u003efor Ski-Doo Blizzard 645 1970-1971\u003c\/li\u003e\n\u003cli\u003efor Ski-Doo Blizzard 776 1970-1971\u003c\/li\u003e\n\u003cli\u003efor Ski-Doo Blizzard 797 1970-1971\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRebuilding a vintage Blizzard driveline during track service\u003c\/li\u003e\n\u003cli\u003eReplacing stripped cogs after a season of hard riding\u003c\/li\u003e\n\u003cli\u003eRestoring a classic Blizzard sled to running condition\u003c\/li\u003e\n\u003cli\u003eServicing the front drive axle during seasonal maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePosition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFront track drive axle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModels Covered\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e640, 645, 776, 797\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYears Covered\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1970-1971\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMachine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVintage snowmobile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e How can I tell the drive sprocket is worn out? \u003cstrong\u003eA:\u003c\/strong\u003e Chipped or missing teeth, a polished or rounded tooth profile, and a track that slips under throttle are common signs of a worn sprocket. Cracks around the hub or splines are signs it should be replaced before the next ride.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need to replace both sprockets on the front axle? \u003cstrong\u003eA:\u003c\/strong\u003e It is good practice to inspect every sprocket on the drive shaft and replace any that show matching wear. Mixing a new sprocket with a badly worn one can cause uneven track engagement.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":51146391060566,"sku":"OO1C26547","price":61.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_4555c37f-3542-4216-af38-5e889bb98dc1.jpg?v=1794568387","url":"https:\/\/www.solidspare.com\/products\/front-track-drive-sprocket-for-ski-doo-blizzard-640-645-776-797-1970-1971","provider":"Solid Spare","version":"1.0","type":"link"}