Scooter Speedometer Drive Gear For Zip50 Zip100 Zip125 Zip 50cc 100cc 125cc 56143R 12mm 2T 4T This speedometer drive gear is designed for use with Zip50, Zip100, and Zip125.It fits models with 50cc, 100cc, and 125cc engines, both 2-stroke and 4-stroke variants.The gear has a 12mm shaft diameter and corresponds to 56143R.It connects the transmission to the speedometer , enabling accurate speed measurement.The unit installs directly into the scooter's final drive assembly and is engineered for under normal riding conditions.