4G - 1B Transmission and INSTALLATION KIT for 49/53cc Huasheng engine

T Belt drive runs much quieter than a chain drive! 4G Model 1B T-Belt Drive Transmission with installation parts kit;    Engine not included: Everything you need except the engine and bicycle to make a motorized bike.    Engine sold separately:  Customer provides their own donor bicycle.  If you want to use of your bicycle gearing for multi speed see our 10G 1BMS kit. 20T drive pulley 100T driven pulley with 9T and 10T slide drive sprockets included.    Use 5M-575 belt Fits Huasheng 4 stroke 49cc/53cc engines with built in centrifugal clutch. 4G 1B Transmission is used on a Huasheng 49cc or 53cc engine with built-in 3 shoe centrifugal clutch.  Engine is sold separately:  Will not work on a straight shaft engine, ie: Honda GHX 50  Must use this transmission with our 10G 1BMS multi-speed shift kit. Starting 2017 all 1B transmissions have 8 mounting holes to enable using 10G 1BMS Multispeed right side drive for a 10 degree downward mount.. This kit comes with a clamp to spoke