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hi my 1100 gw at high speeds is truly a crap out. i cleaned the carbs [not rebuilt] set
the air [manometer] it has a problem at speeds higher than 45mph at full throttle it kicks
and bucks and backfires thru the mufflers. when cold it starts great it has full power
but as riding time increases everything goes to hell.. coils seem fine have changed the
plug wires , new timing belts, set the valves etc.. when turning the pilot screws they seem to no affect on the engine rpm.. so wus up with this.

thx gumby
 

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That kind of problem sounds like it has to be ignition. My 83 would crap out at very high RPMs when I first got her. The problem got progressively worse as it started happening at lower RPMs. It turned out to be one of the coils. I would say to begin test the resistance in the primary and secondary circuits in the coils. I'll bet the problem is in the secondary on one of the coils.
 

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My first suspicion would be the pulser coils then the ignition coils.
 

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1987 GL1200 Interstate
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Sounds electronic to me too. I had a CB550 that needed the plugs changed every 5 or 6 hundred miles or it would do just what your 11 is doing. Nipondensu "Hot-U" plugs solved the problem.

Odd, but those plugs didn't work well in any other bike. :baffled:
 

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As to 1100 crapping out, I've been there we (my wife and I) ride a '83 1100A with 126.000 plus on the ode. We have been from Fairbanks/Anchorage AK to Key West FL. the Gaspe Penn, in east Canada to The tip of Baja, Cabo San Lucas Mex. and all points between. Few years ago we were about to trash the bike cause it was doing about what you describe. Friend said Nah. just run a couple bottles of CHEVRON TECHRONthrough the system. Bike runs like new and gets around 43mpg. Don't use substitustesl. Benthar...
 

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As the coils heat up, the windings inside expand & something may break it's connection. This has all the symptions of the vehicle running out of gas. I would start looking at the ignition coils first.
 

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exavid wrote:
My first suspicion would be the pulser coils then the ignition coils.
:cool:exavid

i am with you on this one. check them first. then go to the coils. my 2 cents.
 

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1993 gl1500, 1976 gl1000
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Don't forget to check your gas cap. Run with cap loose and see of problem is still there. Could also be a ground problem. Check the main ground cable at the engine side. I suspect the pulsers also.
 

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I would check:



1. Gas cap vent. If you open your cap and hear a big "whoosh", may be your problem.



2. Fuel filter.



3. Fuel petcock plugged up (rust in tank).



4. Slides on carbs sticking (common 1100 problem).





These are in order of the cheapest and easiest to check. Exclude these, then worry about the expensive/difficult/PITA stuff.
 

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Another issue could be float levels. I did a full Randakk rebuild and carb synch on my 1100 only to have it bog badly at WOT or on hills. Turns out one of the floats was way off, causing a stutter.

But...chemicals are MUCH cheaper than yanking that $*%&# carb rack off, so I'd start there. Techron and Seafoam that sucker!
 

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I also have a GL1100 I am trying to get running well. I'm curious about the mention/warning of a "whoosh" sound if you remove/loosen the gas cap. What does that indicate?
 

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The pulser coils are in the back of the engine in the housing that the vacuum advance is attached to. You might try heating that area with a hair dryer long enough to get the housing hot to the touch without running the engine then try starting it to see if it acts up before it warms up. One other check that might show up something would be to run the bike while it's acting up and then shut down and pull out the spark plugs. You might be able to determine which pair of plugs are misfiring. Since the two front cylinders are fired by one spark coil, one igniter unit section (or one igniter unit depending on year) and one pickup up coil and the rear two cylinders by the other coil and components it should be possible to determine which part of the system is failing.
 

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col_freecycle wrote:
I also have a GL1100 I am trying to get running well. I'm curious about the mention/warning of a "whoosh" sound if you remove/loosen the gas cap. What does that indicate?
Means your vent on the cap is plugged and the tank is under vacuum. This will cause it to starve for fuel and cause the described symptoms.
 

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Can you tell me where a GL1100 gas cap should vent from? I'd like to check mine and if needed clean it out. Is there a vent in the cap?
 

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Discussion Starter · #17 ·
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hi the cap vents thru the 2 small openings on the cap itself. push down on the springs and make sure that they aren't rusted shut.you can also blow air thru one of the opening holes and feel if there is air coming from the other opposite vent hole.
 
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