gl1100 carbs will not synch

[xodusss]

GL1100 has, New timing belts, timing perfect. All valves adjusted dead on. New head gaskets and seals. Carbs rebuilt with Randaak kit very carefully. Hooked up a brand new 4 gauge carb sync today and cannot synch carbs. Has a bad knock at idle but will rev to 7000 easily.

Left side carbs 2 and 4 synch just fine about 2/3 of the way down the left side on this gauge. This is not my gauge pic by the way.

Cannot synch them to right side 1 and 4. The non adjustable carburetor #3 shows vacuum way past 2 and 4. All the way past bottom center and into the green. Number 1 carb only shows 1/3 as much vacuum as 2 and 4 and adjusted all the way in. At a complete loss on what to do here. It's like number 3 has way too much vacuum and number 1 has half what it needs.

 

[slabghost]

Check for air leaks with carb spray and fix any you find. Set all the air mix screws to the highest rpm you can one carb at a time. Resetting rpm to idle each time. Do all of them twice as each carb will affect the others some. Then try to resynch. It should work. If not you may have a few slides that are sticking. You did keep all the parts to each carb seperate and reinstalled them in the original position? Additionally you may have floats twited or at the wrong levels. You should check the wet levels.

 

[dan filipi]

The non adjustable carburetor #3 shows vacuum way past 2 and 4. All the way past bottom center and into the green. Number 1 carb only shows 1/3 as much vacuum as 2 and 4 and adjusted all the way in. At a complete loss on what to do here. It's like number 3 has way too much vacuum and number 1 has half what it needs.

The reason vacuum is so high on number 3 is because that throttle plate is open less than the others.
Check all the linkage went together properly.

Like slabghost said, make sure there's no vacuum leaks and try the other adjustments but it sounds to me like the sync is just way off. Did you bench sync?
Could also be a jet is still clogged, likely idle jet.

 

[xodusss]

Problem solved, one throttle plate was too high, after adjusting it, all 4
are synched perfectly, new top end rebuild and the old girl
is once again in the wind. Thanks for the help

 

[zman]

Dang!!..Took long enough :mrgreen:
Congrats on the bike being done.

 

[joedrum]

great ..I sure like it when things get fixed

 

[mcgovern61]

xodusss » Tue Jul 30, 2013 4:14 pm[/url]":jesx41tw]
Problem solved, one throttle plate was too high, after adjusting it, all 4
are synched perfectly, new top end rebuild and the old girl
is once again in the wind. Thanks for the help

Were you working on that all this time? :read: :shock:

 

[Steve83]

It's nice when they finally come out right!