gl1100 carb ?


Information and questions on GL1100 Goldwings (1980-1983)
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83gl1100nb
Posts: 39
Joined: Sat Feb 26, 2011 1:29 am
Location: Bothell, Wa.
Motorcycle: 83honda GL1100 Aspencade
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82 Nighthawk

gl1100 carb ?

Post by 83gl1100nb »



i cleaned up the carbs after sitting for a few years. i hooked up a tube to the fuel inlet to test for leaks. everything seemed good, but after filling with some seafoam (approx. 6-8 oz.) i noticed some of it dripping out the vacuum hose port & also the manifold on the #3 carb. when the bowls are full are the floats supposed to stop the flow into them via the little check valves? it seems like nothing is stopping the flow & that doesn't seem right. can someone enlighten me? thank you for any info.


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winguyjo
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Motorcycle: wing1 : 1982 gl1100 interstate; resurrection complete. SOLD
wing2 : 1980 gl1100 interstate; resurrection complete. SOLD.
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Re: gl1100 carb ?

Post by winguyjo »

yes, the floats stop fuel flow by lifting the float needles up into their seats. did you clean the seats ?
i have been getting good results by putting a q-tip in a drill with a little bit of "fast orange" on the q-tip (fast orange is a hand cleaner with bits of pumice in it). a few seconds of this and the brass seats into which the float needles sit are bright shiny brass. clean out any of the remaining residue with carb spray or similar.

if they STILL overflow i have found it helpful to rap on the bowl(s) of the leaking carb(s) with the handle of a screwdriver. this helps any reluctant needle valves to get up into their seats.
83gl1100nb
Posts: 39
Joined: Sat Feb 26, 2011 1:29 am
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Motorcycle: 83honda GL1100 Aspencade
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82 Nighthawk

Re: gl1100 carb ?

Post by 83gl1100nb »

thanks, i'll try that buffing. i did clean them out with a q tip, but not buff it. i am going to order some new needle floats, also. after inspecting them, the one that was on #3 seemed worn more than the other 3 & the plunger didn't seem to be as tall or maybe worn down. also they all seemed to have a little ridge on the black rubber tips from where they seat on the brass seat. so, i'll try that & see what happens. thank you for your reply & merry Christmas!
83gl1100nb
Posts: 39
Joined: Sat Feb 26, 2011 1:29 am
Location: Bothell, Wa.
Motorcycle: 83honda GL1100 Aspencade
95 Concours
82 Nighthawk

Re: gl1100 carb ?

Post by 83gl1100nb »

just a quick ? so, if i bench test the floats with some tubing filled w/gas or seafoam, they should stop the flow once all the bowls are full?
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Overdog
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Location: Pittsburgh, Pennsylvania
Motorcycle: 83 Goldwing Interstate

Re: gl1100 carb ?

Post by Overdog »

Yes they should stop the flow. Also check to make sure the accelerator pump jets are all clear...you should get a nice fine stream out of all four carbs. If you swap out the floats, needles and/or seats you should check the float height. I made the mistake of not checking and had to pull the carb rack another time.
83gl1100nb
Posts: 39
Joined: Sat Feb 26, 2011 1:29 am
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Motorcycle: 83honda GL1100 Aspencade
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Re: gl1100 carb ?

Post by 83gl1100nb »

cool, i'll check the accelerator pump jets, are they the ones that stick up and spray out the gas in the plenum? also, i see a lot of discussion about the float level height, what is so important about that? it seems that as long as they raise up & close the check valves, that is all they need to do. am i missing something here? thanks for your help!
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winguyjo
Posts: 413
Joined: Sat Aug 11, 2018 9:26 pm
Location: b.c. Canada
Motorcycle: wing1 : 1982 gl1100 interstate; resurrection complete. SOLD
wing2 : 1980 gl1100 interstate; resurrection complete. SOLD.
wing3 : 81gl1100i frame/82gl1100a engine/81cb900 bits. resurrection complete. naked. SOLD.
wing4 : 1977 gl1000 black w/ blue pinstripes; resurrection complete. SOLD
wing5 : 1977 gl1000 black w/gold pinstripes; nearly roadworthy when purchased, NOW RIDING.
wing6 : 1975 gl1000 blue; SOLD

Re: gl1100 carb ?

Post by winguyjo »

float height is critical because too high a fuel level will result in that carb serving up a fuel/air mixture that is too rich ... too low = too lean.
that said, unless somebody has been messing around in there, the float height is probably, but not necessarily, ok. always check.
83gl1100nb
Posts: 39
Joined: Sat Feb 26, 2011 1:29 am
Location: Bothell, Wa.
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Re: gl1100 carb ?

Post by 83gl1100nb »

will do, thanks for the explanation. you were right about the accel pump, it is not working. can't tell if it's in the accel pump bowl or the diaphragm/plunger part. i'm soaking the bowl in carb cleaner. when i push the plunger, it doesn't draw fluid into the bowl or push up the channel.
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Overdog
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Motorcycle: 83 Goldwing Interstate

Re: gl1100 carb ?

Post by Overdog »

When I put mine back together the bike fired up instantly.....but would only rev to about 3500 RPM. I had changed the needles and seats but used the original floats so I thought i wouldn't have to worry about float height....WRONG! The openings on the accel pump nozzles are tiny. I used an airgun with a long stem to blow the clog back through the carb rather than out of the nozzle. Don't lose the O-ring that goes between the bowl and carb body...if you get a new kit make sure the O-ring is included. The accel pump nozzles don't spray into the plenum...they spray directly into the intake tubes. I used a long fuel hose connected to the bike with the carb rack sitting next to the bike on a 5 gal bucket. When you have them clear and you work the throttle you'll get a nice fine stream out of all 4 carbs.
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OldguyGlen
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Motorcycle: 1980 GL1100 STD/Vetters
1966 Honda 90

Re: gl1100 carb ?

Post by OldguyGlen »

Cleaning a set of carbs is a tedious job because there are so many tiny orfices and passages. But it can be done by the average DIYer with patience. Small gauge wires, solvents, air pressure, and more patience. Search the forums for threads with pics. The accel pump has check valves pressed into the body. Clean them in-place till they pass air one way only. Nozzle in each intake throat has tiny discharge port facing the inside. Hard to see, I used small wire, in a "J" shape to clear them. Also 4 tiny holes in the carb wall where the butterfly closes need to be clear or it won't idle correctly.
83gl1100nb
Posts: 39
Joined: Sat Feb 26, 2011 1:29 am
Location: Bothell, Wa.
Motorcycle: 83honda GL1100 Aspencade
95 Concours
82 Nighthawk

Re: gl1100 carb ?

Post by 83gl1100nb »

thanks, o.g.g. i boiled the accel pump cover in distilled water & was lucky to get it free'd up. i'll double check those 4 tiny holes in the plenum & cross my fingers.


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