Carb questions

[j0eb0b]

I am in the process of getting a wrecked  GS back on the road.  The bike was manufacturered 08/93 and the title says that it is a 1994 model.  The bike sat for years after the accident and now exhibits the expected carb problems.  I have searched this forum and read most I can find about carb problems which has helped a lot.  I tried to ride the bike some last week and it ran poorly with a 4-5K idle once warm and nothing above 7K but it did start easily.  I noted the advice about high idle and vacuum leaks and believe that i found and fixed at least two but now have problems getting the bike to fire when cold.  I replaced the plug wires and plugs with NGKs and have disassembled the carbs twice and blew the jets out with solvent and compresssed air.  I drained the gas tank and replaced the fulel.  The fuel and vacuum lines are connected as per the How To.    The bike has a K&N filter, stock airbox and exhaust. 

I need to establish a baseline with this bike to troubleshoot frrom. Here are my questions:

I want to replace all of the jets.  From the carb matrix it looks like 127.5 main, and 40 pilot with 2.5 turns of the pilot screw is recommended.  Is this correct for this year and configuration? 

Does anyone know the Sudco part numbers for these jets?

When the carbs came off, the butterfly valves were at different angles.  One butterfly covered all four holes at the front of the carb and the other uncovered 1 and part fo the middle two.  Where should these butterflies sit at rest?

I have verified there is fuel in the float bowls but the plugs don't look like they are getting much fuel with the chock engaged.  Is it possible that i misoriented the float needle valve when i reassembled the carbs?  Does it matter which way the wire hanger at the top of the float needle is facing with relation to the floats themselves?

Although I have searched the forum throughly for FAQs, How Tos ect, if anyone can copy a link with relevant information about the carb setup for this year I'd appreciate it.

[Egaeus]

You're probably going to have to take the carbs apart again, but don't worry, you'll be a pro at it soon. 

Did you clean out the choke jets?  What's a choke jet?  Good question.  You know how the float assembly has an L-shaped tube with an o-ring on the end.  Well, on the other end, there's a jet.  It's not plugged, there's a hole in there somewhere.  I used a bit of brass wire and an air compressor to clean mine out.  The choke actually started to do something significant after that.  That's probably your problem.

The butterfly valves indicate that the carb is waaay out of balance.  They should be open about the same.  Adjust the carb balance screw until they're opened about the same amount.  That should be good enough for now, though a vacuum balance should be in the near future, I don't care what Srinath says.

[Gisser]

When the carbs came off, the butterfly valves were at different angles.  One butterfly covered all four holes at the front of the carb and the other uncovered 1 and part fo the middle two.  Where should these butterflies sit at rest?

At rest?  The butterflies seat themselves against the smaller carb bores.  Here's a way to synch the carbs that's usually good enough: 

1) Insert a brazing rod (or similar with consistent diameter) through each of the carb bores.
2) Let throttle plates (butterflies) close against the rods.
3) Adjust the plate that doesn't seat against the rod until it does.  Now they open and close in unison.