[Mr. Fix it]

Here is the scenario.
1- 1979 GL1000 has sticky sliders & intermittent running issue -fuel related.
2- owner has set of early GL110 carbs rebuilt about 10 years ago but never used
3 - The GL110 butterflies & chokes are frozen
4 -I order Randakk's Master Rebuild kit & rebuild the carbs
- I also install the new aluminum fuel filter from Randakk's
5 - I set the floats to the GL1100 spec's
- At first I set the idle jets @ 3 turns but shortly after running for 5 minutes the left bank starts smoking
- adjust inwards and it clear up.
- the plenum starts to show signs of leakage so off come the carbs again and have plenum flattened at local machine shop.
6- after re-assembling the bike runs great the first day.
7 - the next day the #2 cylinder doesn't fire and fouls out the plug
8 - Check the ignition and find #2 wire has worked its' way loose from the coil
-could have been disturbed when I removed & installed the air box..
9 - new plug and bike runs better but not good.
10 - re-balancing carbs helps but still no good..

I'm at a loss here as this is the first time I have upgraded GL1100 carbs onto a GL1000.

Is there something simple or major I am missing here?

You input is greatly appreciated as always!

 

[Mr. Fix it]

the bike has dyna coils & electronic ignition.
I am installing new spark plugs.

I've been reading about others having great success but others having the same issues as me.

 

[Mr. Fix it]

I will walk through it tonight.
Strangely enough, the #2 cylinder was showing condensation on the intake down spout which is a first for me.

 

[Mr. Fix it]

Exactly, there is no reason it would not run well with 1100 carbs. It might run differently but still should run evenly. I have worked on a couple 1000s with 1100 carbs and they ran just fine. Have one out in my shop right now. If you are sure everything is copacetic in the carbs look elsewhere.

Good morning everyone, good points mentioned all around.

I didn't have an opportunity to investigate last night but should have tonight.
I agree & think I am looking at something other than the carbs.

The original carbs did have a lot of sludge in the bowls

The original fuel filter had separated (typical Emco Filter):lash:
I just have to take my time and walk through diagnosing all circuits to find the issue.

I'll post an update as I find what is really going on.

 

[Mr. Fix it]

quick update.
I checked the Electronic ignition and found the mechanical advance was gummed up. - I freed that up
I found a small trace burn on the back of the adapter plate - I re-soldered the trace.

I replaced the #2 spark plug and it fired up and ran well.
I balanced the carbs again and took it out for a spin.

Lost #2 Cylinder bout 5 minutes into the ride...
I now think it is a coil issue

If it was the dyna ignition, I would expect to lose 2 cylinders not just 1

I plan to swap ignition wires tonight to see if I lose another cylinder instead of the #2 cylinder.
This will definitely prove the coil being at fault.

 

[Mr. Fix it]

Make sure that all of the carbs on the replacement rack are the same model.It sounds strange but I've run into "professionally" rebuilt carb sets were someone replaced one of the carbs with one from a different year bike and especially with the 1100 carbs all of the years are different.

Good point.
I'll double check that if I have to pull them again.

 

[Mr. Fix it]

Quick update...

Switching the spark plug wires made no difference.
#2 cylinder dropped out almost immediately.

So the carbs come off tonight and I will clean up the old carbs and put them back into service.

 

[Mr. Fix it]

Okay, so I have a quick update on this issue(s)

I found the electronic ignition had a bad trace
I found the mechanical advances were seized up
I cleaned the original carbs and re-installed them

It runs much better now that I also polished the sliders from the original set of carbs.
I sync'd them up and the bike runs much better but still has a popping from time to time. - most likely from the deteriorating exhaust system.
One baffle is totally missing and the other may not as well be there.:? it is louder than a normal GL1000 should be.
The bike likes to have the throttle on or gear up to force more fuel into the engine under load then it is much happier.

Again I think it is due to the exhaust not providing the back pressure that it normally would.

Giving it back to the owner today and hope they are happy with itraying:

On a side note: the GL1100 Carbs were all the same model.
I think the #2 carb has underlying issues that I have not solved yet. - maybe a bad float or needle & seat.