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Discussion Starter · #1 ·
I've searched the forums and have not found the info I'm looking for. My GL1100 isn't firing on the #1&3 cylinders at low RPM. The weather has been preventing me from riding it to find out if this is a problem all time or not. I get a slight amount of suction at the tail pipe on the right side and it never gets hot. I'm getting spark and just replaced the plugs. The bike is new to me but the previous owner says he recently rebuilt the ignition system. I've lost his number so I can't ask him for a list of what he's done. It's hard to start sometimes and the idle is set really low. When it's warm it idles at about 700-800 rpm but will usually die if you let it idle for a few minutes. I know the carbs need to be synced and I'm pretty sure the needle and seats are worn. (left the petcock open over night once and had quiet a bit of fuel in the #4 cylinder) What I want to do is check the timing, set the idle, and balance the carbs. What I don't know is what order should I do this in and what parts should I be replacing or cleaning to make sure I'm doing it right. Any input will be greatly appreciated.
 

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You should get it running on all 4 cylinders first or find out why it's not. Run a test at idle, check to see if there is heat at the HEADER PIPES. They should be hot to the touch. If you have one or two that are cool try to raise the engine RPM above idle and see if they heat up. Chances are they will. If so you have Idle circuit blockage which will need to be resolved before you attempt to synchronize the 4 carbs together. If they do not heat up you may have a timing issue, valves. A good compression tester comes in handy here.
If you've varifyed spark at all 4 plugs that tells you that either fuel or compression is missing, my money is on the fuel.

Good luck
 

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What about if you pull the choke? Does it increase the idle speed and cause it to hit on the right side cylinders? Try turning up the idle speed, if it starts to hit then it may be the carbs are just way out of synch. There is no timing adjustment on an 1100 BTW.
 

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If you have spark then I would suggest either a big vacumn leak on #1&3 or the idle circuts in those carbs are blocked. The right way would be to pull the carbs and clean/rebuild them. You can try a heavy dose of Seafoam in the tank to see if that would clear the block. But knowing the seats are leaking I would pull the carbs and rebuild them. Most needle/seats can be cleaned and reused.
 

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Your posts would lead me to believe you have carb issues.
You say you have spark, but your first step here is to CONFIRM it. Pull each plug wire, install a good sparkplug, ground the plug, crank the engine...WITNESS the sparks.
Next, I'd use a compression tester to see that all 4 cylinders are of sufficient pressure, and that they're all somewhat similar.
Here's where you've already narrowed your problem down. Your post says your bike will drain gas right into a cylinder while it's parked, engine off, fuel petcock open. This confirms that no less than one of your carb's needle valves is not doing its job. If you have spark and compression, it'll be worth your efforts to pull the carbs and do a thorough cleaning. Chances are likely that you will NOT need to replace any parts, just clean them up really well. However, there is no way to ascertain whether or not you'll need to replace any broken or overly worn parts until you tear the carbs apart and VISUALLY see something amiss.
Another thing to look at is the throttle linkage between carbs. Make sure all the itty-bitty plastic bushings are in place and doing their job. Then synch the carbs.

Good luck.
 

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Ok, first things first, What year is your 1100? , your idle jets are probably clogged, 80/81's are pressed in 82/83 are unscrewable... Hopefully you have a 82 and up, just remove the idle jets or slow jets and make sure they are cleaned up well.. You will never achieve a good idle with them being clogged and they do get clogged..
 

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Discussion Starter · #7 ·
It's an 80 model. Sorry forgot to mention that. I let it run today at about 1000 rpm for maybe 5 minutes then it died. I checked the temp at the headers and felt heat but it didn't seem as hot as it should. #1 was noticeably hotter than #3. When I started it back up I set the throttle to about 1200 rpms using what I assume is the cruise control (a clamp on the throttle that you can engage/disengage with your thumb) and watched the rpms slowly creep down. I revved it up to about 3500 then set it to run at 2500 for a few minutes and it held steady. I checked the temp at the headers again and #1 was too hot to touch but #3 was still just pretty warm. I confirmed spark on all 4 cylinders when I put in the new plugs just a few days ago. Since then my metric plug socket has gone missing (of course) so I'll get a replacement in the morning and double check. I'll run a compression test as well. I don't notice any difference when I pull the choke. I'm not sure it's hooked up. I'm confused. How is there not a way to adjust the timing? I have a Clymer's that has instructions on how to set the timing. Am I just reading it wrong?
 

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Just no way around it, you are going to have to pull the carbs and do some cleaning.
Your clymer manual probably covers 1000s also, they have a points ignition and you can set the timing on those. 1100s are electronic ignition and there is no adjustment.
 

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You said in your original post that #4 float valve is leaking. In my experiance if this is happening you can't get it tuned until its fixed.
 

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Discussion Starter · #10 ·
You are correct sir. It does cover the GL1000. Well shoot. I was hoping to avoid that. I guess if I have to pull them I might as well rebuild them. I've seen people on this forum recommend a certain website for rebuild kits. Anyone know what that website is?
 

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You are correct sir. It does cover the GL1000. Well shoot. I was hoping to avoid that. I guess if I have to pull them I might as well rebuild them. I've seen people on this forum recommend a certain website for rebuild kits. Anyone know what that website is?
http://randakks.com/
 

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Discussion Starter · #14 ·
Ok. Thanks for the help everyone! It will probably be a few weeks before I get the time to do it but I'll post again when I'm done. Thanks again.
 
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