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Can anyone tell me whether there are any differences between 81 and 83 GL1100 carbs settings? eg float heights, pilot screw, jet sizes etc



I'm have probs with my 83 engine (81 bike). Ran on 2 cylinders after rebuild with 83 carbs and now managed to coax it onto 3 with 81 carbs, which are still fitted. Diaphrams have been replaced, float heights correct but just wondering if there are any small differences in settings as I've been doing both sets of carbs the same.


I've got a new accelerator pump/diaphram to fit to see whether that improves idling and while i've got the carbs out again i'll whip out the jetsagain and pop them into the ultrasonic cleaner once more.



Incidently, the small corugated rubber sleeve that fits over the accelerator pump rod, is pretty hard. Should this be soft and does it form part of the seal? I don't think they're available separately soif anyone has a spare that's in good condition i'm on the lookout?
 

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Hi Glasgowing, major difference between the 1100 carbsis the '82/'83's have screw in idle jets; '80/'81 had press fit idle jets. Sizes are the same for all jets, float levels are the same (15.5 mm or 0.61 in.). Pilot screw initial setting is 3 turns out for the '82/'83; 1 1/4 turns out for the '80/'81. One thing to bear in mind if she won't idle well is the idle jets have a tiny hole in the middle (see picture). Something difficult to see when you are holding one in your hand much less in the carburetor.

New accelerator pump won't help the idle but will go a long way to eliminate the dreaded flat spot on take off. The rubber sleeve is only a dust seal, but should be soft. A new one should come with the new pump. You will want to fill it with silicone grease before installation, otherwise it will push outwhen you push the rod through it.


I looked through your rebuild pictures, you should be very proud.
 

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Thanks for that Jack, I am very proud as you say, It's been a long rebuild but so worthwhile. I got her ready for the road 2 weeks ago and rode her down to the workshop for MOT and tune up. 2 weeks later the carbs still were't right but she was ridable.

I done our maiden voyage at the weekend,a 280 mile roundtrip to my club rally and got there and back unscathed but not without issues. It was the big shake down though anda couple of issues need sorting most notably the carbs.



Interesting point is the pilot screws -I had the 83 carbs fitted and they were adjusted 1 1/4 turns. the workshop fitted the 81 carbs eventually and I'm sure they've adjusted the pilot screws also 1 1/4 turns, not 3 as you recommend! might be part of my problem. I'll check tomorrow. main issue is only running on 3 cylinders most of the time and difficult idle.



Are the press fit idle jets on the 80/81 removable at all?



If Ismeared the protruding metal pin of the accelerator pump in grease would that suffice? I just wasn't sure whether the rubber sleeve formed part of a seal. the new pump was from a carb specialist and didn't come with this rubber. Just the diaphram and new spring
 

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If you set the pilot screws at 1 1/4 on the 83 carbs tgey will definitely be too lean to idle well. the holes in the idle jets are so small they don't clean weel even with ultrasonic. if they don't pick up when you open throttle you may need to check that the slides aren't sticking in those carbs as well. make sure the vent hole in the slider cap is clear and when you turn the cap upside down with th eslide piston in place it should move freely, bounce on spring. if not you may need to clean and polish the center shaft on slide and in cap. just a littel film on them will cause them to stick and bind.
 

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The 82 1100 aspencade carbs. I put on my 81,had teflon sliders.I used the non teflon sliders out of my 81 carbs.I was wonderning if that was the only year(82) that had the teflon sliders in them.I read that they had some problems with those,like a recall.

Bobby
 

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Hi Glasgowing, the '83 carbs should have the idle screws set to 3 turns out (starting point) or as TBear says, she won't idle very well.

Some of the folks on here have removed the press fit jets by turning a screw down into the large top opening. This gives you something to get hold of and pull straight out.Just be sure you don't go too far and mess up the tiny jet hole.

Greasing the accelerator pump rod before inserting through the dust seal should work fine.

Bobby, I bought my '82 in March of '82 and it didn't come with teflon coated sliders. I believe the teflon units came in late '82 or '83. The problem as I understand it, just like your teflon coated frying pan, the teflon wore off with use.
 

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Well the '83 carbs were definately set 1 1/4 turns out so that was an issue for sure. I used the 80 GL1100 Haynes manual info. Doh! Could only get 1&3 firing well and suspect there was a slider sticking as the revs took far too long to come back down.



So fitting the '81 carbs, they've been set to 1 1/4 turns out and diaphrams replaced. Float heights spot on (on both sets)

Just to pull the carbs again andreplace the accelerator pump and i'll make sure there's plenty of grease to keepaway unwanted dust. I'll also go in to carb 4 again and see if I can spot any blockage. as this is the one that seems to be not running well now.

I must admit i'm a bit wary of screwing into jets but i'll see how it looks first and try pluck up the courage to yank it outlol





Incidently i didn't notice whether either sethad teflon coated sliders. How do you tell?



Also is there a way of clearly identifyingwhich years the carbs are from? I don't think there are serial numbers or such like is there?
 

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Glasgowing you would definately notice the dark teflon coating on the sliders,I just didn't know what it was until I looked it up.I believe you have idle jets clogged up,My 81 carbs.had the pressed in jets,I haven't taken them out,I just used swaped the sliders into the 82 carbs.these have removeable slow idle jets,since I'm fixing the 81 Wing I set my jets 1 1/4 turns out.I seen on here that someone cleaned out thier idle jets with a very small Guietar string,or a welders tip cleaner tool to clear the tiny hole without removing them,just a thought.Mine wouldn't idle at all...the idle was up and downuntill I used a tiny wire on a wire brush to poke the holes clean.Before you put them back on hook a fuel hose to the #3 carb from the petcock on the bike have the carbs sitting lower than the fuel tank so the fuel can gravity feed into all the carbs.,so you can see if it leaks.Hopes this helps.Don't give up you can do it!

Bobby
 

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Jackjohn:I was wondering if they discontuined using the teflonon the sliders,also if the coating can be removed?Thanks!

Bobby
 

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honda had the dealers install the teflon coated sliders as a fix for some badly scuffing slides in early 82 carbs. a warranty fix at the time. I haven't seen any listing for them otherwise but some dealer might still have a set I guess., Scuffing seems to be a common problem on 82 and 83
 
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