I sourced a heavy duty "piston" BMX stem and welded-brace bars, caliper brake, and lever off one of my old bikes. I'm going to put it on my grubee beach bike instead of the old BMX stem and single bar. I am tired of the cheesy twist grip throttle anyway. I'm going to put the caliper brake on the back and run the lever on the clutch side, and convert my coaster hub to freewheel. Then I'm putting a thumb throttle on the right side.
I think it will be much nicer to ride with some real solid bars and fixed grips, and with the ability to move the pedals around where I like. I thought about parting out this bike or selling off the motor, but I think I'll just change it up a little and ride it for all it's worth.
The BMX is too small for me and the wheels suck. The frame, bar and stem seem pretty good though.