I am getting ready to build my first motor bicycle and was wondering, first how to find the right bike. should I buy it off line from a site that has the motors, and bikes also? Or should I look localy? and what is the best quality engine to start with ? My spending buget would be $250 for an engine. Or should I buy a cheaper one that can be up graded with things like a high performance carberator, pipes, filters etc. ?