GL1500 Carbs -- Need Help! - Steve Saunders Goldwing Forums
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post #1 of 18 (permalink) Old 02-26-2011, 09:25 PM Thread Starter
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I have searched the forum but haven't found anything that describes my problem which is unusual.

Ok so here it goes........

My brother bought an 88 1500 that wouldn't run unless the choke was on. We pulled the carbs, put in new jets, float seats and needles. Replaced the vacuum hose on the intake, reinstalled carbs, checked all vacuum hoses and routed them. Cranked up bike and now can run without choke.

But now the problem......

It doesn't idle correctly. I have checked and double checked all hoses, both Air Jet Solenoids and everything else the book has said to check. Still surges from 750 to 3k. I have to have the idle adjustment full open to keep it running. I seem to hear a vacuum leak from the left carb but I am danged if I can find anything.Just to test my theory, I coverd the left carb with my hand and was able to adjust the idle down to 850 and run smooth. My hand barely got wet with gas. So I removed my hand and the idle fell down to 500 and was hard to keep running. Cranked it back up and covered the right carb with my hand and it immediately got wet and idled real rough.

The carb slides (vacuum Pistons) seem to be operating together and smoothly after twisting the throttle a couple of times quickly. The accelerator pump is pumping gas when called for. I need some expert advice. What do I need to check/replace?

Snorebaby (Doug) and Snorebabe (Michele)
'15 GL1800 Scarlett

'90 GL 1500 SE Pearl
'86 CMX450 Rebel
'85 GL1200 LTD---SOLD
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post #2 of 18 (permalink) Old 02-27-2011, 05:53 AM
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Did you say you did a carb balance yet?




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post #3 of 18 (permalink) Old 02-27-2011, 07:36 AM
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or maybe have a float thats not set right or hanging up . or as rudy said--carb balance. i still have that long screw driver and gages.

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post #4 of 18 (permalink) Old 02-27-2011, 07:52 AM
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My guess is the top of the left carb is not sitting right if you tightend the bottom 4 screws on the heat exchanger first it knocks the carb alignment out for the top loosen the top screws and make sure its seated right

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post #5 of 18 (permalink) Old 02-27-2011, 09:23 AM Thread Starter
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Thanks guys....Yes the carbs are balanced...checked and double checked that also.

Wayne..put new float needles and jets and set the height.It could still be off....

agnogel...yes I put the bottom heat exchanger on first when putting the carbs back together. Will loosen the top bolts and check that.

Snorebaby (Doug) and Snorebabe (Michele)
'15 GL1800 Scarlett

'90 GL 1500 SE Pearl
'86 CMX450 Rebel
'85 GL1200 LTD---SOLD
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post #6 of 18 (permalink) Old 02-27-2011, 12:20 PM Thread Starter
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Update:

Checked the top of the carbs...all good

Haven't looked at the floats yet...want to describe the problem a little better in case I have to buy parts.

Sounds like a vacuum leak on the left carb. Also when twisting the throttle, there is a rumble sound coming from the left carb also when twisting. The right carb is real quite. Covering the left carb with a rag brings the idle up and steady (800rpm).Covering the right carb with a rag brings the idle down. If both are uncovered, I have an idle of about 400 and will die unless I have choke on or the idle screw is all the way in. Could the slider needles be a problem?Could a low/high float cause the problem? Could the pilot screw need adjusting on the left carb even though I didn't touch it? I know it is something simple....just can't figure it out. The air sound from the left carb is really driving me nuts.

Snorebaby (Doug) and Snorebabe (Michele)
'15 GL1800 Scarlett

'90 GL 1500 SE Pearl
'86 CMX450 Rebel
'85 GL1200 LTD---SOLD
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post #7 of 18 (permalink) Old 02-27-2011, 02:11 PM
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I take it you had the diaframs out if so it may not be seated right in thelittle grove float ajustment would need to be way off and you would be running so rich you would smell it also is the carbs sitting in the collers right and last did by any chanse you may have snaged one of the overflow tubes while pressing the carbs down you should not need to go near the poilet screws if you did not remove them i think your going to have to pull them again and check all

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post #8 of 18 (permalink) Old 02-27-2011, 02:28 PM Thread Starter
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Thanks...

Not the slides...never removed them...but if I have to remove the carbs I will check them out. Someone else may have done that and got one pinched as the leaking sound has been there from the start.

I found a couple of threads that kinda pertain to what my problem is. They mention using bigger jets. I replaced the jets with what the spec was in the manual. I have bigger jets for the other 1500's (my 90SE and later models). Should I use the bigger jets to remove the hesitation the 88-89's are known for? I know the trigger wheel is a good fix as I have it on my 90SE and it removed my hesitation.

Snorebaby (Doug) and Snorebabe (Michele)
'15 GL1800 Scarlett

'90 GL 1500 SE Pearl
'86 CMX450 Rebel
'85 GL1200 LTD---SOLD
Patriot Guard Riders #137660

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post #9 of 18 (permalink) Old 02-27-2011, 02:49 PM
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I guss Doug your looking for the easy way out by not pulling the carbs again if you have the hesation prob before i recomend the 91 jet sizes and you need to go through the carbs witha fine tooth chome

Peter

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post #10 of 18 (permalink) Old 02-27-2011, 03:01 PM Thread Starter
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Not really looking for an easy way out...just hate to pull them again. It's the rad hoses I hate dealing with!!

I will pull them again, check/recheck everything mentionedand put in the newer jets. Hopefully will not have to do this again LOL!!

Thanks again!

Snorebaby (Doug) and Snorebabe (Michele)
'15 GL1800 Scarlett

'90 GL 1500 SE Pearl
'86 CMX450 Rebel
'85 GL1200 LTD---SOLD
Patriot Guard Riders #137660

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