For the cost of the GEBE systems I can get an electric bike...so for my needs (a college kid needing a bike to commute to work and college [a max 4 mile ride]) a little cheap 2 or 4 stroke will work great. Winters can get pretty bad but I'll practice good road safety. A 2 stroke 48cc engine (legal limit here) with everything needed is about $170. That's $500 LESS than GEBE kits...are they that much worse? Any opinion will help. I also am confused as to mounting. Looking at a mountain bike as the start but all I've ever seen really done are cruisers and choppers.