Multi Speed Shift Kit > Less 4G 1B Transmission

Grubee Inc


1BMS 23456&7 KIT only;   No 4G 1B Transmission is included with this add;   This add is for those whom already have an existing older model 1B trans.  9T sprocket transmission and willing to re-drill 4 mounting holes.. 

10G  Multi speed shift kit for 2016 GruBee Model 1B 4G transmission designed to custom fit the and SkyHawk GT2A bike frame.  Allows using bicycle's multi speed gearing to shift engine power curve.   5 speed e-bike hub axles work great. 

Mechanical aptitude and tools are needed,.  Engineering degree not required.

  • This is a shift parts kit only: P/n 1BMS 23456&7  
  • No 4G-1B transmission is included;  
  • To fit on a big hole GT2A built in tank frame you will need to buy a small hole to big bottom hole conversion kit.  p/n WP-CK   Our current production frames come with a small bottom hole hence no need for a WP-CK conversion kit,
  • To order both a 1B Transmission and this Mult-Speed kit see our Total 10G Multi Speed add listing. 
  • This add is for those who already have a 1B 4G 8 hole transmission and also have a Gt2A bike frame.
  •  Heads up:  Does not include the following items: 
  • No 4G 1B transmission,
  • No 4 cycle HuaSheng engine;
  • No WP-CK Small to big hole kit,
  • No SkyHawk GT2A Bike Frame.  
  • The Beautiful Blue Multi-Speed bike built by Dave Harber in TN is shown for illustration purpose only:  No way included. 

NOTE:  1B transmissions made in 2016 and after have the 4 extra engine mount holes pre-drilled to allow the transmission to tilt down approx. 10 degrees.  see pic. 

Say Howdy!  This Kit has been Up Graded:  Our current 10G Multi-Speed KIT production now has a larger size Double Universal Joint with needle bearings versus a smaller one of less durability as was found in initial production of 2016.   This 2017 new DUJ is Definitely a remarkable heavy duty improvement and of course higher priced.   You get what you pay for.   

Shipped to USA lower via USPS Priority Mail.

  1. Shipment to Alaska or Hawaii will cost more.  Contact us before you buy.