Best kit for a folding bike

[thxcuz]

I'm looking at a folding bike on CL and I was wondering the best way to motorize it. I know friction would be easiest but I would like other ideas.
Thanks
Btw the bike looks like this

 

[WightBoy]

Could always go electric. That would keep the folding part in tact. Or maybe one of those axle mounts from staton-inc? I personally wouldn't want to put an engine on anything that folds in half that easily. That's just me though.

 

[wheelbender6]

I still think friction drive is your best option. The 20" wheels allow you to mount the engine almost as low as a frame mounted engine.

 

[5-7HEAVEN]

When I installed a Subaru engine and friction drive on my 20" Dahon, the bike could no longer fold. When I replaced the drive system w/ 2.2hp Mitsubishi engine and Staton chain drive, the bike could now be folded.However, the bike became squirrelly with the extra power. It was literally a "widow maker". I restored the bike back to original and gave it away.

 

[thxcuz]

Got the bike, probably made by puch. Needs a little cleaning and tightening. I think I'll just put the friction drive I have on it. I need something smaller than my heavy old crusier since I'm moving soon.