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

4G > 1A   Our most popular T Belt Drive 4 stroke HS 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;  Not for Multi Speed 10G. 
• 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 with dual ball bearings, No bushings: 
• 80T Driven pulley also has dual ball bearings and freewheel. 
• Built to last!