engine stumbles on acceleration


Information and questions on GL1500 Goldwings (1988-2000)
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JBRANDT_SR
Posts: 5
Joined: Thu Jul 07, 2011 9:42 am
Location: Houghton, MI
Motorcycle: 1983 GL1100A Aspencade
1988 GL1500 Aspencade

engine stumbles on acceleration

Postby JBRANDT_SR » Fri Aug 05, 2011 7:24 am



I have an 88 Aspencade 1500. When I am rolling at minimum speed in any gear and I hit the throttle the engine hesitates before it accelerates then it goes so fast it makes the bike almost uncontrollable in any turns. Is there something wrong with the carburators that can be rebuilt to correct this problem?



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themainviking
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Location: North Bay, Ontario, Canada
Motorcycle: 2009 GL1800 AD

Re: engine stumbles on acceleration

Postby themainviking » Fri Aug 05, 2011 8:04 am

I would say that this is a great possibility. And if I were you, I would get it done as quickly as possible, before the crash that is inevitable, happens. Almost to fast to control seems like a problem. Is this something that just happened, or have you been living with it for quite some time? Is it a "New to you" bike? Do you have an unusual riding pattern of totally open throttle?
It ain't about the destination - it's all about the journey

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robb
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Joined: Mon Jul 19, 2010 7:46 pm
Location: Lexington, North Carolina
Motorcycle: 1989 Honda GL1500 Aspencade

Re: engine stumbles on acceleration

Postby robb » Fri Aug 05, 2011 10:42 pm

Check the vacumn tubes on the heads, they may not be split at 90 degree bends but may be soft enough to suck closed. In area of middle plug on each side. Idle increases as vacumn decreases. Try about 6 oz seafoam or bottle of injector cleaner in fuel

JBRANDT_SR
Posts: 5
Joined: Thu Jul 07, 2011 9:42 am
Location: Houghton, MI
Motorcycle: 1983 GL1100A Aspencade
1988 GL1500 Aspencade

Re: engine stumbles on acceleration

Postby JBRANDT_SR » Sun Aug 07, 2011 10:44 am

themainviking wrote:I would say that this is a great possibility. And if I were you, I would get it done as quickly as possible, before the crash that is inevitable, happens. Almost to fast to control seems like a problem. Is this something that just happened, or have you been living with it for quite some time? Is it a "New to you" bike? Do you have an unusual riding pattern of totally open throttle?

The throttle is not in the full poition it just seems like it is when the bike takes off. It does not happen every time and affects the bike mostly in first gear. The only time it seems too fast to control is when turning, when I just go forward it is no problem because it acts like I am just taking off really fast. I just bought the bike recently and I do not have many miles on it yet.

JBRANDT_SR
Posts: 5
Joined: Thu Jul 07, 2011 9:42 am
Location: Houghton, MI
Motorcycle: 1983 GL1100A Aspencade
1988 GL1500 Aspencade

Re: engine stumbles on acceleration

Postby JBRANDT_SR » Sun Aug 07, 2011 10:51 am

robb wrote:Check the vacumn tubes on the heads, they may not be split at 90 degree bends but may be soft enough to suck closed. In area of middle plug on each side. Idle increases as vacumn decreases. Try about 6 oz seafoam or bottle of injector cleaner in fuel

Thanks for the information. I will check the vacuum lines and see if there is any problem with them. I already ran injector cleaner and seafoam through the gas and it has not helped yet.

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robb
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Re: engine stumbles on acceleration

Postby robb » Sun Aug 07, 2011 6:30 pm

Mine had a higher rev than normal until I repaired both intake tubes. If tubes are bad can cut off and use a tubeing coupling and new tube to avoid removing carbs. I used heatshrink tubing on mine to retain the bends for a close fit.

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reasonator
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Location: Corydon, IN
Motorcycle: 1989 GL1500

Re: engine stumbles on acceleration

Postby reasonator » Sun Aug 14, 2011 8:29 pm

I have a very similar issue with my '88 GL1500! Mine happens in 1st and 2nd ONLY, once I get to 3rd it accelerates as smooth as can be. Taking off, it's like the carbs are choking and then all of a sudden fuel flows freely and the bike "lurches".

I have been chasing this problem for a few months and have tried everything just shy of a carb tune up. My next step for this problem is to dig down to the diaphram and make sure its not dry rotted, cracked or otherwise in disrepare.

Please post here and let me know if you find a fix!
"Those that dare to be can never be weak." - Unknown

JBRANDT_SR
Posts: 5
Joined: Thu Jul 07, 2011 9:42 am
Location: Houghton, MI
Motorcycle: 1983 GL1100A Aspencade
1988 GL1500 Aspencade

Re: engine stumbles on acceleration

Postby JBRANDT_SR » Mon Aug 15, 2011 9:56 pm

I am still checking out my vaccuum hoses. I will post when I find out what the problem is.

arremm
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Joined: Thu Apr 28, 2011 2:52 pm
Location: London, England, United Kingdom
Motorcycle: 2000 GL1500 E

Re: engine stumbles on acceleration

Postby arremm » Tue Aug 16, 2011 9:51 am

Hi,
I only bought my 2000 GL1500 about 4 months ago and had exactly the same problem that you have described, I went on various sites and had a wide variety of replies, ranging from changing the clutch fluid to trying to explain to me how to ride a bike!
I am an engineer, I have had bikes for around 50 years, I don't need telling how to ride a bike and as for changing to a different clutch fluid.....there is no real answer to that ..........well not printabe :-).
My original thoughts were either ignition problems or more that likely carb settings/balance. I had a major service done and the carbs balanced ......you would not believe the difference! The guy that did the service, Dave at "Awing Away" in UK....a Goldwing star, reckoned that the main problem was the carb balance.
I hope this helps but now I have a totally different bike, a pleasure to ride, smooth on pull-away, get the carbs done, it will be money well spent.

Regards Ross Marshall

JBRANDT_SR
Posts: 5
Joined: Thu Jul 07, 2011 9:42 am
Location: Houghton, MI
Motorcycle: 1983 GL1100A Aspencade
1988 GL1500 Aspencade

Re: engine stumbles on acceleration

Postby JBRANDT_SR » Tue Aug 16, 2011 11:50 am

I can relate to the many years of riding as I have been riding since 1971 myself. I am checking out the vaccuum tubes first as I am still learning about how the covers are removed without breaking them. The second thing I will check out is the carbs and the vaccuum diagphrams in them. If that fails I will them have the balance checked on the carbs. My bike sat for over two years without being run and the mechanic that worked on it said there was no problem with it before then. Thanks for your information as I am sure it will be very useful to me.

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Mooseman
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Motorcycle: 1996 GL1500SE 88k
1986 GL1200A (SOLD) 81K
1985 GL1200A (SOLD) 85K
1986 BMW K75c 25K

Re: engine stumbles on acceleration

Postby Mooseman » Mon Aug 22, 2011 1:00 pm

I have a 1200 that sat for several years and had this hesitation problem. Was very annoying to say the least. No amount of Sea Foam or MMO would help. I had to remove the carbs and clean them. Found two idle jets and a couple of passage ways blocked or restriced. After cleaning all jets and making sure the little passage ways were clean and checking float height, It ran like a charm and no more hesitation.
A good carb sync is always good also.
Enjoy the ride. They are all good, just some better than others.
Mooseman

floydthiessen
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Location: Canada
Motorcycle: 1982 GL1100A Aspencade

Re: engine stumbles on acceleration

Postby floydthiessen » Fri Aug 26, 2011 10:02 am

I had a similar problem. Added fuel conditioner/octane booster and fixed right up

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robb
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Location: Lexington, North Carolina
Motorcycle: 1989 Honda GL1500 Aspencade

Re: engine stumbles on acceleration

Postby robb » Fri Aug 26, 2011 4:53 pm

Fuel and octane booster work great if moisture is in the fuel. Higher octane will burn rougher when engine is not running right and can burn valves when forced to run.

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landisr
Posts: 393
Joined: Tue Jul 28, 2009 12:18 pm
Location: Gilbert, AZ
Motorcycle: 1976 GL1000
1994 GL1500A

Re: engine stumbles on acceleration

Postby landisr » Tue Aug 30, 2011 10:22 pm

It seems to me there was a recall on the early 1500s for this very problem. Lookie Lookie:

http://www.goldwingdocs.com/Docs/Honda% ... -FA21B.pdf

Ron in MI
Beam me up, Scotty. There's no intelligent life down here.

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landisr
Posts: 393
Joined: Tue Jul 28, 2009 12:18 pm
Location: Gilbert, AZ
Motorcycle: 1976 GL1000
1994 GL1500A

Re: engine stumbles on acceleration

Postby landisr » Tue Aug 30, 2011 10:27 pm

PS to JBrandt: I was just up in your neighborhood this weekend. Ever heard of Paulding? A few of the guys in our group went out to check on the ghost lights, and sure enuff, they saw them. We stayed at the casino in Watersmeet. I love the H/H and Copper Harbor area.

Ron in Lansing
Beam me up, Scotty. There's no intelligent life down here.

bro
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Joined: Wed May 04, 2011 8:13 pm
Location: Newburgh, NY
Motorcycle: 2003 GL1800 Orange

Re: engine stumbles on acceleration

Postby bro » Thu Sep 01, 2011 6:29 pm

I don't know if all the carbs are the same but I just had the carbs out from my friends 99 1500. One of the carbs has an accelerator pump on it. Its pretty easy to check if it is working or not. You have to remove the top middle shelter ( The one with the radio in it ). Then remove the air filter. Start up the bike and give the throttle a little twist. There are two small tubes, one on each carb, right there on top and they should both spray a little gas into the top of the carbs when you give it that little twist. It only gives each carb an extra shot of gas. It does not continue to spray. If the Accelerator pump is not working you probably either have a clog or the little pump needs to be rebuilt. Both of which mean removing the carbs.

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reasonator
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Joined: Wed May 04, 2011 3:25 pm
Location: Corydon, IN
Motorcycle: 1989 GL1500

Re: engine stumbles on acceleration

Postby reasonator » Mon Sep 05, 2011 11:10 pm

My big concern is the fact that the engine/carbs only stutter in 1st and 2nd gear?! Once im in 3rd, everything is as smooth as silk!! Any ideas on this symptom?


"Those that dare to be can never be weak." - Unknown


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