{"product_id":"beefed-up-final-drive-gear-set-for-gy6-engines-wit","title":"Beefed Up Final Drive Gear Set For GY6 Engines With 2.555 To 1 Ratio 18T 46T Upgrade For 139QMB 139QMA 147QMD Scooters Mopeds Go Karts 49cc 50cc 80cc 100cc Performance Transmission Upgrade","description":"\u003cdiv\u003eGY6 Scooters 2.555:1 Final Drive Gear Set Upgrade\u003cbr\u003e\n✔️ 2.555:1 final drive ratio; fits 139QMB\/139QMA\/147QMD \u003cp\u003eThis upgrade is a complete final drive gear set designed for GY6-based engines used in scooters, mopeds, go-karts, and ATVs. It replaces the stock gears to boost top speed and provide a more usable RPM range when paired with a big bore kit or performance transmission.\u003c\/p\u003e ✅ 2.555:1 final drive ratio for higher top speed and improved cruising RPM\u003cbr\u003e\n✅ Replaces stock final drive gear and front counter shaft\u003cbr\u003e\n✅ Fits most Chinese 139QMB\/139QMA\/147QMD engines in scooters, mopeds, go-karts\u003cbr\u003e\n✅ Requires pressing gears off the shaft and counting teeth before install (18T\/46T variants)\u003cbr\u003e\n \u003cp\u003e💡 What is a final drive gear set for gy6 engines and why upgrade it?\u003c\/p\u003e\n\u003cp\u003eHandy overview for riders considering gearing upgrades:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEnhanced 2.555:1 final drive ratio improves top speed while keeping rpm in a usable range\u003c\/li\u003e\n\u003cli\u003eWorks well with big bore kits and performance transmissions for a steady ride\u003c\/li\u003e\n\u003cli\u003eFits common gy6 families like 139QMB, 139QMA, and 147QMD\u003c\/li\u003e\n\u003c\/ul\u003e\n✝️\u003c\/div\u003e","brand":"Amazon","offers":[{"title":"Default Title","offer_id":49044039860459,"sku":"VXB0D3HYJGPF","price":66.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/610Ofv8yLIL.jpg?v=1783911911","url":"https:\/\/vxb.com\/products\/beefed-up-final-drive-gear-set-for-gy6-engines-wit","provider":"VXB Bearings","version":"1.0","type":"link"}