Hey all, this is my first time posting to any sort of forum, so I hope I am doing this correctly. I'm a college student looking for a more convenient method of transportation, so I'm hoping to motorize (gas) my foldable citizen gotham 7 bicycle. Here's a link to the bike: http://www.citizenbike.com/catalog.asp?product_category_id=1&product_id=24 My bike has a rack mounted on the rear tire, and I was thinking that it could be possible to mount a motor there, and perhaps a gas tank under the seat on the stem? I'm not trying to show off to everyone and make this thing look like an actual motorcycle, like a lot of the bikes I've seen on the internet. I'd like it to look as "modest" as possible. Anyways, is motorizing this bike with a gas engine even possible? Will mounting the engine to the rear rack work? If not, are there any other options? Thank you for your time; any advice will be greatly appreciated!