Getting closer - electrical problem

[nabrams]

OK, now that you've got past your initial problem you need to go through the full "check-list" of verifications listed on this forum multiple times (see my replies on this post for example: http://www.thegsresources.com/_forum...d.php?t=111791).
The particular symptom you describe can have multiple causes.
I'll just stress here that without a compression check and valve adjustment you'll be shooting in the dark for weeks.

[t3rmin]

Well you should do a "bench synch" while you have the carbs off, that means getting the throttle openings matched. Do a search for various techniques.

Once you've got them on the bike your next step is a vacuum sync. This may indeed help with your "choppy" exhaust. Also mixture screws and valves, of course.