A few questions before i build my motor bike

Manta,
Maybe this will explain what I was talking about. > Shaft-driven bicycle - Wikipedia, the free encyclopedia Keep us posted on your build. I've toyed with this concept myself but have not tried anything yet.
Tom

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for a vert shaft you might be able to put an idler wheel on one side if the rim and the drive wheel from the motor on the other so the rim won't bend

I have seen a video of something like this done before. (Found it here: Vertical Shaft Motorized Bike) It seemed to be functional but it looked like a great deal of work and I would prefer a brake lever type of clutch.

Judging by the number of times the question has been asked (many) and by how many bikes have been built (few) I would say that most people who start with a vertical shaft motor abandon the idea and find something with a horizontal shaft.

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hey thanks for everything this is definetly the most helpful site so far just a couple things my engine only ways about ten pounds or so and my dad and i will be able to mount it umm it sounds like if i use this method i should put on the tire sidewall the only thing is i am worried the tube will blow and the tire will wear really fast so how often do your tubes blow and and how fast do your tires wear out also i have some trampoline springs i could use for what you are talking about so could you maybe post some pics also if this fails i will try and find somewhere to trade my engine for a horizontal shaft weed wacker engine since they have centrificul clutches how would i mount that though?

if your going to do a sideways friction it would be ALOT better to put it on the rim
you can still have a lever clutch just have to make it pull the motor sideways away from the rim

yes that was my plan but for some reason people think it will bend my rim wall which i highly doubt it will and if that is the case i will use a brake disk for it to rub on then no wearing on the tire and no blowout

i am thinking i will try it on the rim with an idler wheel on the other side the only thing is will the the rim bend or just one sidewall cause then the idler would have to be inside the tire and that wont work

has anyone ever heard of that break disk idea above mentioned

i think i will start soon with a friction drive and an idler wheel will try to keep u updated thanks all other input still appreciated

Friction drive on the disc for a disc brake? In the usual spot with a vertical shaft 4 stroke friction drive providing the motivating force?

If I understand this correctly then I think you might want to look into the rack mount kits. They are the simplest to install and have proven to be very reliable. It is likely that you will find the greatest success with one of these.

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Find out about my latest bike project at: Tribridbike.com