Currently the drive train will be similar to the rokon a standard torque converter to a jackshaft from that jack shaft a chain will go to the rear swing arm sprocket just like a suspended standard minibike . Also on the main jackshaft will be the overrunning clutch with a sprocket on it...
I bought this new on ebay search 12hp universal joint it cost $37.35 $14.34 shipping for a total of $51.69 I never used it I just slightly removed the sharp inside edges to make it less likely to bind then I greased it
It's yours for $35.00 free shipping in the contental usa
Very good point
The last mistake was a sprocket it was only 1 tooth away from being correct and normally I would be ok with it but when making a kind a complex driveline I can't have the front and rear drive ratios fighting each other