Motorized Tandems, Trikes and Recumbent BicyclesTrikes (tricycle) and recumbent bicycles can give the ultimate in comfort for cruising on long trips or just around town. Ad an engine and they will really turn some heads.
Is the sprocket warped? That's always fun. Make sure nothing is moving axlewise or flex on the chassis and engine mounting also.....doesn't take much torque to move things around if they're not rugged enough
I'm not giving up just yet. I'll check the flex and the sprocket again. It seems to be running true, and the torque converter may be flexing some since I moved the drive gear to the outside of the shaft.