tell me which to use

[Spikedfox]

I have these four engines to build my motor bike with, I live in north carolina where the 50cc rules do apply

49.5cc motor from a chinesse scoot (will end up either belt driven or friction drive)
3.5hp briggs and straton (is it to big? im a big guy so trust me its not to heavy)
5hp briggs and straton (this thing cant be street legal can it)
weed eater (use to be an outboard motor from a summer project 11 years ago)

what can i say im a mad scientist with a taste for off the wall

[Pablo]

3.5hp briggs and straton (is it to big? im a big guy so trust me its not to heavy)
5hp briggs and straton (this thing cant be street legal can it)

Definitely TOO HUGE for 50cc.

But the 5 hp sure would be cool!

[jasonh]

You might be able to get away with the 3.5, but you'll not want it to say 3.5hp on it anywhere

[Bikeguy Joe]

I'd go for the CCS engine (cheap chinese scooter). It's got a variable transmission as well, plus it's "legal".

[Spikedfox]

yes and lucky fo me the rear half of the engine already faild so i dont feel so back chopping it off

[Spikedfox]

Im debating weilding myself a trike together aswell

[Spikedfox]

OK Ive decided, THe challenge that I being currently both broke and unemployed. I am gonna make a motorbike. and the one rule is i cannot spend any money doing it.

I have what most of you have a few bike frames, i also have a few motors and i have one thing most of you dont. an old scooter i got off craigslist.

i got it and its twin brother from a ladie for 250usd and built one from them. i still have a good motor with a ruined cvt.

Parts i will be using
chinesse scooter engine, tank, throttle, cdi, I hope i dont need the cpu becauseits dead. also the harnes is cut so i will have to rewire the engine a little. good thing is the magnetto supports a full lighting system.
huffy beachcomber cruiser (hunter green of course)

i need to install a front brake, mounting hardware, and a battery(for the electric start)
im keeping the front half of the cvt transmission and welding a sproket to the clutch nut.
and finaly i will set up a sproket on the opposit side of the tire to the peddle sprocket

Remember everyone ive never made an mb before.
Ill take all of your advice i can although the trik design with that wonderful 5hp briggs and stratton is looking like so much fun

[Spikedfox]

ok the trike thing is still making me want to build it. so who wants to see me build a mt
(mototrike) i can always change engines to the 3.5 down the road (which displacement on is 115cc according to a website i read.

[Bikeguy Joe]

Build it, and post some pictures along the way.

[OSCAR383]

Build The Biggest One You Can Remove Any Stickers That Say What Hp Or Cc It Is And With A Big Grease Pen Write 32cc. :d That Way If Questioned You Can Say Well Its Looks Bigger That 32 But Definatly Not Over 49.