Motorcycle Repair: 77 gs550, suzuki motorcycle, zukes

Question
 I cant get the 1 and 4 cyclenders to fire.  I have comp. and spark but I beleave no fuel.  I am wondering where the 3 lines that come off the carbs. go to?

Answer
Take a look at this diagram for reference:

http://www.bikebandit.com/houseofmotorcycles/suzuki-motorcycle-gs550b-1977/o/m60...

It actually shows four hoses coming out of the carbs. I believe (from your point of view sitting on the bike) your left top hose goes to the carb, your right top hose (is a breather hose) routes under the tank and is left open, and the two bottom hoses are overflow and route back of the motor to the ground and are left open.

Not sure since both my Zukes are 82 and have the newer carbs. You might try posting a question to the tech forum at www.thegsresources.com.