1981 cb750c - Wont Turn Over / Charge / and Stalls Out

Posted by bcombs99 on Sep 07, 2013; 2:29am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/1981-cb750c-Wont-Turn-Over-Charge-and-Stalls-Out-tp4045469.html

I recently bought a rebuilt 1981 cb750c - completely bobbed out

2 MAJOR ISSUES:

Its a gorgeous bike, but I can't keep it running.

(Problem 1)
When I picked it up it was running fine.  Then 4 hours later when I got home I turned the key and it would rev twice then die.

The guy that did the rebuild put in a new battery, stator, rotor - etc...  And I've tested  them all with a multimeter and they are all reading good.

Therefore, the only way I get it running is when I jump it from my truck.

(Problem 2)
When it IS running after I jump it...  It is running really rich...  The Choke cable has been jammed so we disconnected it and installed a spring to have the choke run half open.
-Carbs have been completely cleaned
-Rejetted
-Float Needle Valves have been replaced on all 4 carbs
After this was done it was running okay... It would start up fine (after giving it a lot of gas) and it would go into 1st gear okay...

However after about 10 miles or so - the tank got low and I stopped for gas... Since then It hasn't been the same...

I jumped it to get it started and tried to go into first several times and it would stall every time... Even when I would try with the throttle wide open...


Does anyone have ANY ideas???

Below is the bike: