85 750 xi conks out

Hi guys been a few since I tore my rotator on an 1100 zxi and retired my
goggles. Well decided to get my feet wet (no pun) once again. My son gave me
this 84-85 750 xi that didn't run in 4 years. Pulled engine and tank and
cleaned all tar etc.. Blew out the fule lines and carbs and low and behold
it started and ran for a short distance n e way. Seems that when I shoot
some startup into the carbs she runs for about 5 minutes then shuts down. I
was wondering if I may have put the return line on the feed spigot???? Can
someone help me out with a schmatic? As u know Kow just wants to sell new
ones unless I just didn't see the support area of their site. In any event
if this don't work I guess I will need to have carbs rebuilt or buy new. Any
sugestions greatly appreciated.
Stevo