Need some ideas on how to mount this engine

As a metalworker, I'd say cut the frame, weld in a motor plate, get the plate down as low as possible, the lower the plate, the shorter the chainpath, and gyroscopic effect of motor minimized. A high mounted engine wants to ' torque ' the bike to one side during acceleration

Most 4 stroke guys do away with pedals, if you need them for legality, check out Graucho's photo collection . In my opinion, welding
[ brazing ] is needed to build a safe bike .
 
As a metalworker, I'd say cut the frame, weld in a motor plate, get the plate down as low as possible, the lower the plate, the shorter the chainpath, and gyroscopic effect of motor minimized. A high mounted engine wants to ' torque ' the bike to one side during acceleration

Most 4 stroke guys do away with pedals, if you need them for legality, check out Graucho's photo collection . In my opinion, welding
[ brazing ] is needed to build a safe bike .

Never thought about "the lower the plate, the shorter the chainpath, and gyroscopic effect of motor minimized." Thanks. Looks like I'll do away with the pedals and find a good welder. You wouldn't happen to have a picture of what the motor plate should look like, would you?
 
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