{"product_id":"gy6-50cc-139qmb-final-gear","title":"GY6 50cc (139QMB) Final Gear - 52 Tooth (Long Case)","description":"\u003ch2\u003eGY6 50cc Final Gear for QMB139 Engines\u003c\/h2\u003e\u003cp\u003eThis final drive gear is made for GY6 50cc scooters and works with both short case and long case engines. You can pick between two tooth counts, 51 or 52, to match your engine. Like other \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc scooter parts\u003c\/a\u003e, it forms part of the scooter's drivetrain and helps move power through the transmission. If the splines look worn or the scooter slips under load, swapping out this gear will help restore proper performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTeeth:\u003c\/strong\u003e 52, for long case engines (51 tooth is the short case gear)\u003c\/p\u003e\u003ch3\u003eFunction of This Part\u003c\/h3\u003e\u003cp\u003eThe final drive gear sends power along the transmission to the rear wheel. Grinding sounds or slipping are common signs that it has worn and needs replacing.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Splines:\u003c\/strong\u003e 19\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Diameter:\u003c\/strong\u003e 18mm (peak to peak)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 15.7mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e GY6 50cc (QMB139) engines with a long case, 52-tooth final gear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eCompatible with:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eQMB139 50cc\/49cc engines (long case, 52 tooth)\u003c\/li\u003e\n\u003cli\u003eVarious unlisted makes and models with QMB139 engines (long case)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Only install the 52 tooth gear in a long case QMB139 engine. Short case engines take the 51 tooth gear. Confirm the gear has 19 splines and an 18mm inner diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBrowse more:\u003c\/strong\u003e \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc Scooter Parts (139QMB)\u003c\/a\u003e · \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-transmission\"\u003eScooter Transmission \u0026amp; Final Drive\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"Default Title","offer_id":51135895273529,"sku":"TT-16643","price":11.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/gy6-50cc-139qmb-final-gear-1.jpg?v=1794350015","url":"https:\/\/www.trendtimes.com\/products\/gy6-50cc-139qmb-final-gear","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}