GL1500 questions - Honda Goldwing Forums
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post #1 of 13 (permalink) Old 09-15-2013, 06:37 PM Thread Starter
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GL1500 questions

I bought this bike as a barn find. Just got it out of the shop and i'm not sure if he done the carbs right or not.

I know the bikes tend to have a flat spot during take off.
I have that and also notice that if i'm cruising and crank the accelerator, it also has a flat spot before picking up speed.

is this normal or did he mess up?

i also notice during warm up on choke it sounds like it is sucking air from carbs. back off the choke and the sucking sound dissapears and the idle is irratic.

What do you think?
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post #2 of 13 (permalink) Old 09-15-2013, 06:46 PM
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A carb sync may have not been done.



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post #3 of 13 (permalink) Old 09-15-2013, 07:12 PM
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ANything is possible BUT I had EXACTLY the same issue after my GL1500 sat for four years. I took it to my regular guy, twice, to a supposed GL1500 expert and it got better but had the flat spot. A mechanic (looked like he was not old enough to drive) in Kansas spotted the issue; a pin-hole in a diaphragm. Replaced the parts and it runs - perfect. Lots of so-called experts could not fnd the issue.
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post #4 of 13 (permalink) Old 09-15-2013, 07:19 PM Thread Starter
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since i haven't really had a chance to ride it, i don't know what is NORMAL for these bikes. I had thought about replacing the seat but i'm now thinking a custom made seat may be in order. I'm a little thick and the wide front part of the seat causes my left leg to gramp almost imediatley.
I don't know how he cleaned the carbs or what he done with them but i'm running seafoam in my gas. 100 miles so far. Still a smooth ride.
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post #5 of 13 (permalink) Old 09-15-2013, 07:23 PM
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What is normal is the engine runs super smooth and there are no flat-spots whatsoever. I ran enough seafoam through mine to fill a bathtub and it cured the off-idle issue quickly. The roll-on flat spot was the diaphram in the carb, once replaced, the machine (no longer mine) runs perfect. I met little brother in August in Dodge City and rode the 1500, it was nice. Ran perfect.
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post #6 of 13 (permalink) Old 09-15-2013, 07:30 PM Thread Starter
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im also debating on weather to keep it or sell it. It is a beautiful bike but still needs minor things. Along with my left leg cramping, the engine gaurds get in the way of finding the brake pedal and the down shift peg. I also have a 1100 shadow and so far, it just seems like neither bike fits me.
I'll try to get things worked out on the goldwing. Maybe it is just a matter of getting used to it.
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post #7 of 13 (permalink) Old 09-15-2013, 10:53 PM
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Originally Posted by Delmarosalinda View Post
im also debating on weather to keep it or sell it. It is a beautiful bike but still needs minor things. Along with my left leg cramping, the engine gaurds get in the way of finding the brake pedal and the down shift peg. I also have a 1100 shadow and so far, it just seems like neither bike fits me.
I'll try to get things worked out on the goldwing. Maybe it is just a matter of getting used to it.
The first thing I'd try is to synchronize the carbs. If you can't get a steady vacuum level on the synch gauges on the TWO carbs at various rpms levels then you've got a vacuum leak, and most likely what I've just corrected and Fossil92 Bill corrected shortly before me. If you CAN hold a steady level on the vacuum gauges at various rpm levels, then you have a tight vacuum system and can synchronize the carbs.

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post #8 of 13 (permalink) Old 09-16-2013, 03:51 AM
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If you're having carburetor issues you might consider Randakk's Carburetor Rebuilding services. He is the best I'm aware of. I'm not sure he does GL1500 carbs but it wouldn't hurt to ask.

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post #9 of 13 (permalink) Old 09-16-2013, 04:16 AM
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Sounds like you've gotten pointed in the right direction. As John said normal is a smooth running machine, quick starting, very little chock, & not many issues.

Wings are certainly not for everyone but I would suggest you put the time into making it run correctly before you discard it. Give yourself a chance after it's running properly to get used to it.



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post #10 of 13 (permalink) Old 09-16-2013, 08:58 PM Thread Starter
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The more i ride the bike the better i like it. I find it a bit difficult to hike my leggs up to find the shifter or brake. I think a smaller engine gaurd would help also.
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