On a kawasaki zephyr 750 set of carbs, where do the two hoses that come from between carbs one and two and three and four go( not the vacuum hoses, or fuel hose. Are these the heater hoses?

sticking choke maybe when u push it back in when bike warm.

sounds a bit like its s ucking air, the vac line opens the fuel valve, so I assume you disconect the line and hold your finger over it, and it runs until it gets low on fuel in the carbs.
Maybe the vac hose is leaking on its connection or has a hole, or the diaphram in the fuel tap is gone.

At least one carb is flooding badly and will need a clean, but the vacumn fuel tap is also leaking or it is in the prime position.

I turn the carb. upside down and set the float level with body

ZX750
ZL750 Eliminator
GPX750
GPZ750
Should all fit

Ride Safe
Bike-Doc

I would rejet the carbs. I would go one size up on the jets. That should clear up the problem.

http://www.repairmanualclub.com/motomanuals/index.php?cid=9

You may find what you want at this site, but if not, Google "1991 Kawasaki Zephyr 750 motorcycle manual". There are plenty for sale.

sounds like your battery has an internal short circuit, time to change it and hope nothing else got damaged

The carbs have some very tiny passages that will easily be blocked by that varnish reside. You will need to pull the carbs and flush every jet drilling with an aerosol carb cleaner like gumout Remove the jet and blow the spray cleaner through, rinsing out ant gum build up. Clean all the passages you can find and the rest of the carb linkage and bod. Idle passages are vacuum drawn and if your manifold vacumm is low then the fuel cannot be sypyphoned. to keep the engine running. Vacuum leaks are common on bikes that sit because the hoses dry up and loose thier seal. Check all you hoses and replace any in doubt. Good luc And let me know, please.- Ned