Hi I'm Steve and me and my friend are going to be making motored bikes this summer. I thought I'd run some ideas and questions by you guys for some help. We just plan on making a simple, cheap and easy motor bike. We're just gonna get some cheap bikes and a rear mount and hook the engine up directly onto the gears on the bike with a clutch of course. His dad can weld so we were gonna reinforce the mounts to make sure they are sturdy. My first question is how powerful of an engine should we aim for. We both weigh about 130 lbs and want to go pretty fast hopefully 25-30mph. Is there anything we should know before we start buying the materials and building? Thanks for all your help in advance. Oh I forgot to ask is it easier to use a one speed bike or a multi speed bike? Or does it not really matter?
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