people do love motorized bikes. and yes, it could be a good way to make a few bucks. alot of people want a motorized bike, but cant or dont know where to get one. but not if you know nothing about them.
people see me zipping around and having a blast. and they want that feeling to i guess? but whet they dont see is the many hours of work going into my bike. and all the thought put into fixing things when they go wrong.. china two stroke motor kits are cheep for a reason!!
some people dont have the info or tools they need to work on and keep these motor running. and will look to you for that being the bike builder. and if you dont know anything about them, they have a pile of useless parts on there bike. and a mad bike owner id think.
i see this as a DIY kind of hobby for the most part. i mean people do buy them built already. but they will need worked on from time to time to time ect. and if you cant do it yourself and your not going to be on the road long.. or you will make a bike shop rich.lol