motor assist

No way you can modify it to fold.

The engine and FD hits the midframe squarely.

Not grazing, or an inch clearance.

LOL, you'd have to grind off 6" of engine.
 

Looks like that would work but for this bike I'd also like to eliminate chain and transmission drag while peddling without the engine running. I do have a jackshaft, bearings, sprockets, etc., setting around so I could come up with something. Just a quick release would work fine for my purposes.
 
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Looks like that would work but for this bike I'd also like to eliminate chain and transmission drag while peddling without the engine running. I do have a jackshaft, bearings, sprockets, etc., setting around so I could come up with something. Just a quick release would work fine for my purposes.
Could work but they don't state the gear ratio of the trans.
 
OK, 3:1 is poor. It should be 4:1 or 5:1. A very large rear sprocket
would have to be used, depending on the drive sprocket, to develop
torque.
 
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