1990 Suzuki Intruder 750. I pulled the rear carb off a few weeks ago to replace, and now that I am ready to put it back on, I can't remember where all the hoses go. Anybody have a hose diagram I can look at?

take it back to where you had it repaired it is their responsibility to get it running.

Put the bike up on the main stand. Remove the rear brake caliper assy. Loosen the rear axle and pull it out. Now pull out on the wheel, pull it away from the rear gear housing, the wheel will disengage a gear inside and then it is ready to pull out the back.

if it has 2 carbs the front carb could be gummed up

float stuck

No, not at all.

Normal procedure is to turn off ignition and any plug in accessories and simply remove terminal connections.

The site below has exploded view diagrams for your bike to help with access. All sections are covered.

Battery has a vent tube attached that will come out with the battery. If stuck, remove tube from battery and pull from beneath bike. Identify tube as there is a few other tubes from carby/crank etc.

Cheers.

http://www.cmsnl.com/vs750-1991-glfm_model14236/partslist/?q=vs+750

Did you sync the two carbs? If not the rear may be getting all the gas from the rear carb and none to the front. Twist throttle engine off and see if front carb cable is pulling the carb open.
Also unscrew the spark plug boot from the front spark plug wire and trim 1/8th inch off the wire and screw the boot back in. The plug wire end may be corroded on that wire.

It could be a stuck choke, but it could be a stuck carb float, or needle valve. You may want to pull the carb bowl off and check and clean.
Once you get the bowl off, you can use a can of spray carb cleaner to spray the needle valve (gas inlet to carb), and inside the bowl, any jets and around the choke. Also check your air cleaner.
While you're at it, pull the spark plugs, and check to see how they look. I would clean them with carb cleaner, make sure there's clean metal at the electrode and replace any that look questionable.

Short answer no, it is most likely running too rich & will need to pull the carbs & replace the oversize jets with, either the factory jets or smaller ones.

sounds to me like a jeeting issue with the carbs. If you have an aftermarket pipe then I would reccomend haveing the jetting changed in the carbs.