4G 1A Transmission only: Fits Huasheng 49 & 53cc CC engines.

Grubee Inc


4G > 1A   Our most popular T Belt Drive 4 stroke HuaSheng engine transmission.

Fits HuaSheng 49cc 142F and 53cc 144F engines with tapered shaft and built-in Centrifugal Clutch.   Does not fit 5/8" straight shaft engines.   Be sure you have the right engine before ordering.   

T Belts run much more quieter than a chain drive. 

Latest Peak-a-Boo cover design:  See the wheel turn!  

 Engine and bicycle are not included:

  • Model 1A is more compact for better appearance with an improved belt cover design:  

  • Best choice for single speed applications;  

  • Transmission Pulley Ratio: 20T x 80T = 1 to 4 ratio

  • 9T and 10T slide drive sprockets included for customer choice.. 

  • Final drive ratio depends on what drive sprocket and wheel sprocket is used.

  • Final drive ratio ie: 20/80T = 4     9T/48T = 5.3    final R = 4 x 5.3 = 21.2

  • Final drive ratio ie: 20/80T = 4   10T/48T = 4.8    final R = 4 x 4.8 = 19.2

  • Final drive ratio ie: 20/80T = 4     9T/56T = 6.2    final R = 4 x 6.2 = 24.8

  • The lower the ratio (19.2)  the faster you can go

  • The higher the ratio (24.8) the more torque for heavy set riders or for steep hills.

  • Cam lock tension system for belt adjustment means no belt idler is needed.

  • Peek-a-boo nylon/fiber glass belt cover guard.  

  • CC latch bell is supported on 2 sealed ball bearings, No bronze bushings: 

  • 80T Driven pulley also has 2 sealed ball bearings and a freewheel for easy pedaling engine off.. 

  • Built to last!    

  • Should you want to buy a ready made 4 STROKE ENGINE bike made by a professional company we recommend the CHEATA BIKE COMPANY based out of Milwaukee Wi.      www.cheata bikes.com See attached pictures of their masterpieces.