1A VS 1B transmission

[INTP_ty]

Has anyone used these both?

For the Huesheng 142/44

SkyHawk 4 Cycle________ ENGINES, KITS AND PARTS

GruBee Skyhawk T Belt drive 4G transmission kits and service parts for motorizing standard bikes and also Multi Speed Shift for Gru-Bee Gt2A frames with built in Gas tanks.

www.grubee.net

 

[CrazyDan]

I haven't used all the grubee transfer cases, just the 1b and 1c. The 1a is for flat land, the 1b is for hills. The 1a has a 4:1 reduction with either a 9 or 10t output sprocket and an 80t freewheel driven pulley. The 1b has a 5:1 reduction with either a 9 or 10t sprocket and a 100t freewheel driven pulley. The 1c is in between on reduction with a 5:1 reduction with a 100t solid driven pulley and freewheeling 12t output. You can swap parts between all tapered shaft engine variants, just need to make sure to use the right belts (Except for the output sprockets for the 1a and 2a, they aren't swap-able with the 1c output sprocket, shaft sizes are different). You can put a 1c driven pulley on a 1a or 1b shaft with the 1a/1b output sprocket to get engine braking.

 

[INTP_ty]

That Grubee plate mount gonna work? Is there a better one?

I’m ordering the 1a. I’m only 160 & it’s the 53cc

 

[CrazyDan]

The grubee plate is by far the beefiest of the 49/53cc mounting plates, that I've seen at least.