Transmission Upgrade Kit; 139QMB p200e This design changes the pull

This design changes the pull ratio of your throttle cable

By optimizing the intake and exhaust timing

Total length: 81

Vision 150

Length: 250mm

Transmission Upgrade Kit; 139QMB p200e This design changes the pullThis NCY transmission kit for most 139QMB GY50 style 50 cc (4T) Chinese scooters is the highest quality OEM replacement kit available anywhere, and that will allow your transmission to run smoother, longer, and more efficiently. You'll never have rollers flatten out on you after 200 miles or have your drive face cut up your belt ever again. Manufactured in Taiwan, these components are the best you can buy today, and pay for themselves in saved service