4G model 1A KIT fits HuaSheng 49/53cc . 4 stroke engine

Grubee Inc


1A Our most popular 4G transmission!

This is a 4G Model 1A Trans. complete with bicycle installation parts kit; 

Everything you need except the bicycle and engine to make a motorized 4 cycle engine bike.  

Must use either a Huasheng 49cc 142F-1G or 53cc 144F-1G engine with OEM built- in centrifugal clutch on a tapered crankshaft end.   Not for 5/8" straight shaft engines.   


For a complete kit set up order engine and 1A Trans kit separately;  see add herein.

Peak-a-boo belt guard allows placing LED lights in the pulley holes that can turn on when the pulley rotates.    Comes with a conversion kit to allow mounting the pedal shaft in a big bottom hole made for one pcs cranks or in a small bottom hole made for a 3 pcs crank.  Rear wheel chain sprocket clamps to spokes.    Engine bracket has slide end pieces that allow length adjustment to fit frame variations.

List of parts included wit this 4G 1A kit.

  1. Model 1A 20Tx80T T-Belt Transmission  with 9T and 10T drive sprockets;
  2. See transmission ratio and final drive ratio specs listed at 1A transmission only;  
  3. Adjustable engine bracket.  2 cast iron ends with steel top plate.
  4. Drive Sprocket Note:  Use 10T for speed and 9T for hill country.
  5. Handlebar twist grip throttle with kill switch
  6. 2.5L gas tank plated inside to prevent rusting
  7. Brass shut off valve for gas tank
  8. Clamp to spokes 48T bike wheel chain sprocket with installation kit;
  9. Clamp to spokes sprocket is cheap way to go,  recommended way is use a heavy duty axle kit. 
  10. Belt adjustment spanner wrench
  11. Complete Wide Pedal kit. 
  12. Ball bearing chain idler
  13. Instruction manual
  14. JIMCO offers best pricing on Huasheng engines and service parts.   call:  816 331 4738.   GruBee is not a Huasheng dealer. We buy them from JIMCO in Raymore MO. so our prices may be higher.