Typical Easily made motor bike

[srdavo]

regular bicycle, single speed, chain is mighty tough!!

I use it for my main drive chain on my trike. but I'm powered by a 2hp (barely) russian engine. still....on the trike....no problems pulling my large carcass around!

 

[5-7HEAVEN]

MrSteve, my 1.6hp friction drive pushes me almost 27mph on flat ground. thats 45lbs bike and 193lb rider. but at $421 for the kit, it's not cheap. i've heard of used weedeater motors being fitted w/BMX peg for friction drive. your friend's dad could fabricate a mount, and throttle lever&cable is less than $7.
you might get by for less than $75, including the bike.

 

[MisterSteve124]

ok thanks thats a good idea I'll get one of those.

 

[srdavo]

have a look at this homebuilt bike project.
http://www.motoredbikes.com/showthread.php?t=4770

and these,
http://www.motoredbikes.com/showthread.php?t=4138

here is a weed eater powered bike. she aint pretty, but she's pretty fast!!
(built by Lacey)

 

[MisterSteve124]

Do you think a 3hp Briggs and Straton would be a good choice for an engine? The only thing I am worried about is it being too heavy.

 

[azbill]

if you want to stay legal, most states and provinces go with 48cc or less
bigger than that and they might classify it as a moped, and make you insure, register, and plate it

 

[MisterSteve124]

Ok thanks for that information I'll keep that in mind. But if I were going to use that do you think that would be enough power? And do you think it would be too heavy?

 

[azbill]

power would be more than sufficient
not sure about weight, do you have one to weigh?

 

[MisterSteve124]

no but I am guessing it may be up to 25 pounds

 

[srdavo]

weigh closer to 40 lbs.