GL1500 Carb question


Information and questions on GL1500 Goldwings (1988-2000)
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ScottA
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Joined: Mon Jun 27, 2011 11:37 am
Location: Granite Falls, NC
Motorcycle: 1985 GL1200A
1975 GL1000

GL1500 Carb question

Postby ScottA » Wed Jul 24, 2013 4:30 pm



Howdy Folks! I've been working on 'Wings for 20 years, but this is a new one for me.
Working a a set of GL1500 carbs. Coming off the bottom of the float bowls are 2 small vent tubes which come into a "Y" fitting. Some previous "mechanic" broke the nipple off of one of the float bowls and (OH NO!) JB Welded the vent hole shut. Arrrg.
Question 1: Does this matter in the running of the bike (I suspect it does)
Question 2: Does anyone happen to have a used one they could sell me?

Thanks,

Scott Austin



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virgilmobile
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Motorcycle: 1988 GL1500 I
Previously owned
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84 GL 1200 I

Re: GL1500 Carb question

Postby virgilmobile » Thu Jul 25, 2013 6:45 am

They are not vents,there the drain.

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willemrita
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Motorcycle: 1995 GL 1500 Asp

Re: GL1500 Carb question

Postby willemrita » Thu Aug 01, 2013 2:22 pm

Please allow me to also ask a Q concerning the carbs on a 1500. My former bike was a Honda Varadero 1000cc. The carb model, and boy was she heavy on gas. I replaced the airfilter with a K&N and rejet the carburators using Dynojets . My gas consumption got better (sorry for the metrics) by 4 km/liter. As my GW seems to be heavy on gas, I am considering the same procedure. I cannot however find a Dynojet kit for the Goldwing. My bike gives me around 33 mpg on the open road at 75 mph. Does that seems to be normal. I have to look for a gas station at 140 miles on a tank. I ones even run out of gas before that. I read on this and other forums about riders who gets 42 mpg. Is it only my bike that is heavy on gas.
Please advise.

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virgilmobile
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Motorcycle: 1988 GL1500 I
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83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: GL1500 Carb question

Postby virgilmobile » Thu Aug 01, 2013 2:36 pm

I drive a 88.fully serviced by me.I average 32 in town conjested traffic and a lot of shifting.
On the highway at 55 mph I get 36 mpg.
This bike has never gone over 40 mpg.
My 83 gl1100 would hold 42 mpg all day but it weighed 300 pounds less.
The best mileage per gallon is from a well tuned engine and driving habits.
Sync the carbs,adjust the idle jets,be certain the air cleaner is clean and tend to the spark plugs.

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willemrita
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Motorcycle: 1995 GL 1500 Asp

Re: GL1500 Carb question

Postby willemrita » Thu Aug 01, 2013 2:49 pm

Thanks. I was thinking that I bought a military tank and not a bike. Everyone, bikers, I talk to seems to agree that the consumption I get is good for the kind of bike. I have done new plugs and airfilter, The plugs on the right bank seems a bit wet while those on the other bank seems to be dry. I am expecting to sync the carbs during next week and I am sure it will up the consumption.

Thanks again
Willem

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ct1500
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Re: GL1500 Carb question

Postby ct1500 » Thu Aug 01, 2013 7:31 pm

My mileage has always been between 36-44 MPG depending on road and driving style.

Your spark plugs (wet on right side) are telling you there is a problem and your mileage will increase when that is addressed. A sync will likely not cure that.

At the bottom of this page is what your plugs should look like.

viewtopic.php?f=14&t=17014
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

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RBGERSON
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had every year from 75 to 83

Re: GL1500 Carb question

Postby RBGERSON » Fri Aug 02, 2013 8:16 am

back to original ? can you drill it out a little tap it or just install a new "compression".sealed fitted tube.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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bstig60
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Re: GL1500 Carb question

Postby bstig60 » Mon Aug 05, 2013 9:55 pm

I just returned from a 2500 mile trip on my 88. Some freeway, (about 700 miles) and a lot of secondary roads. I averaged 43 over the entire trip. Lowest was 36 cruising at 80 on the interstate.
Bill

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willemrita
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Motorcycle: 1995 GL 1500 Asp

Re: GL1500 Carb question

Postby willemrita » Tue Aug 06, 2013 3:15 am

Thanks for the info. I will keep looking untill I found the thing that is stealing my expensive gas and mileage.
I did a jet change on my Varadero (1000 cc), Dynojet kit together with a K&N airfilter which did the trick, but it seems to me that nobody on the forums has done that on a GW. With the consumption better than mine, it will however not be neccassery. The GW throws up dust through the front forks and this is exactly where the intake is, so the aircleaner will sucks in a lot of dust, which spells disaster. Everytime I drive up and down the road to connect to the tar the bike must be washed cause of the dust it gathered.

Happy miles to all Wingers.

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virgilmobile
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Motorcycle: 1988 GL1500 I
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82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: GL1500 Carb question

Postby virgilmobile » Tue Aug 06, 2013 8:09 am

RBGERSON wrote:back to original ? can you drill it out a little tap it or just install a new "compression".sealed fitted tube.


Personally,other than replacing the bowl,I'd just unplug the hole and leave it.
The only time there would be gas in the hole should be if you loosen the drain screw....It's not a vent to my knowledge...I think the "vent" is the metal pipe at the rear of the carb and points toward the gas cap.
It's suppose to drain into the hose and under the bike....How many times do you drain the carbs?
think I've done it once in 2 years...I could live with it draining on the rubber mat with the bike outside.
A sheared off nipple would be near impossible to "fix"...JB Weld on another one most likely would just fall off again...Don't drill and tap it out.You don't want to plug the hole.




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