89 GL1500 choke stuck on?


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nick2681
Posts: 12
Joined: Thu Mar 26, 2015 8:43 am
Location: Lebanon, PA
Motorcycle: 1989 GL1500

89 GL1500 choke stuck on?

Post by nick2681 » Sun May 12, 2019 2:14 pm



Hi everyone!

New development as I'm getting ready for the new riding season. My 89 GL1500 acts like the "choke" is stuck in the ON position: the thumb switch moves freely (no tension or resistance, as it did last year when everything worked fine), there is no change in the engine when it's running and I move the switch, and the engine idles high as it did when I had the choke on (and it gets higher as the engine warms up).

So...is this a question of seafoam or something similar, or is it time to make an appointment at the shop? Any suggestions of things to check?

Thanks,
Nick


1989 GL1500

Former Rides:
1982 GL500 Interstate
1980 GL1100

First Ride: on the back of my late grandfather's 1985 GL1200LTD

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CrystalPistol
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Location: Shenandoah Valley of Virginia
Motorcycle: 1985 GL1200A
1997 GL1500SE Lehman Trike

Re: 89 GL1500 choke stuck on?

Post by CrystalPistol » Sun May 12, 2019 3:03 pm

nick2681 wrote:
Sun May 12, 2019 2:14 pm
Hi everyone!

New development as I'm getting ready for the new riding season. My 89 GL1500 acts like the "choke" is stuck in the ON position: the thumb switch moves freely (no tension or resistance, as it did last year when everything worked fine), there is no change in the engine when it's running and I move the switch, and the engine idles high as it did when I had the choke on (and it gets higher as the engine warms up).

So...is this a question of seafoam or something similar, or is it time to make an appointment at the shop? Any suggestions of things to check?

Thanks,
Nick
The GL1500 choke isn't really a choke. It doesn't cause air to be choked off to richen fuel mix, rather it causes extra fuel to flow to richen mixture. If riding at speed, it'll sure cause increased fuel use but you'll likely not notice a real drop in power.
It doesn't choke the engine like the choke on your lawn mower. Since the engine still get's air freely, the engine runs … a little richer & thirstier … but it will run.

As to tension or resistance, mine has little or none until the latter half of travel, then it stiffens.

Do you hear that whistle sound when used? It almost seems normal from reading your description?
Image

nick2681
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Motorcycle: 1989 GL1500

Re: 89 GL1500 choke stuck on?

Post by nick2681 » Mon May 13, 2019 9:54 pm

It currently starts and idles around 2000rpm and increases to 2500+ as it warms up. This is with the "choke" in the off position. Last year it idled around 800rpm as expected and would only be up in the 2000s when I had the "choke" on. There is no change in rpm at all as I move the switch - it stays in high idle. That's why I was wondering if something is stuck (or if it's just gunked up on the inside and just needs seafoam and fresh gas)
1989 GL1500

Former Rides:
1982 GL500 Interstate
1980 GL1100

First Ride: on the back of my late grandfather's 1985 GL1200LTD

Rambozo
Posts: 32
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Location: Disneyland
Motorcycle: 1992 GL1500 Aspencade

Re: 89 GL1500 choke stuck on?

Post by Rambozo » Mon May 13, 2019 10:47 pm

Sounds like something is gummed up. Maybe the cable needs some lube? Or the return spring is broken or disconnected.

nick2681
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Location: Lebanon, PA
Motorcycle: 1989 GL1500

Re: 89 GL1500 choke stuck on?

Post by nick2681 » Tue May 14, 2019 7:12 am

I know this isn't a choke in the traditional sense, so is there any chance that the mixture/"choke" mechanism is tied into the throttle cable/system at all? A couple weeks ago, I had the right grip off because I was following the directions elsewhere on this site for cleaning the contacts on the start/reverse button. I had some difficulty getting the throttle cable both off and back on the grip, and is there a chance something got bumped around in this mixture system too?

I'm waiting on new spark plugs to arrive and will be replacing them as soon as I can. While I have it torn apart, is there anything else that I should remove in order to see where this "choke" cable is? Would like to hit two birds with one stone if possible...

Rambozo -- where is this spring/what am I looking for?

Thanks everyone! Been a long-time lurker of the site and I appreciate the help.
1989 GL1500

Former Rides:
1982 GL500 Interstate
1980 GL1100

First Ride: on the back of my late grandfather's 1985 GL1200LTD

Rambozo
Posts: 32
Joined: Sun Apr 01, 2018 8:36 pm
Location: Disneyland
Motorcycle: 1992 GL1500 Aspencade

Re: 89 GL1500 choke stuck on?

Post by Rambozo » Tue May 14, 2019 8:36 am

The plot thickens.
Yes, there is a link between the choke and the throttle idle setting. The choke not only enriches the mixture, but also raises the idle speed. With a dual cable throttle you should be able to close a stuck throttle as one cable is made to do just that. Try turning off the choke, then close the throttle beyond where the spring stops it. It might be stiff, but you might find the idle will lower as long as you hold it. That assumes most of the throttle system is working, just binding. If you put it together really wrong, all bets are off. Either way you should take it back apart and make sure everything works smoothly, and there is no binding. Even cable routing can impact how it works. One cable pulls it open and one pulls it closed, so even if the return spring breaks, the throttle won't get stuck wide open. Unfortunately, the choke is only a single cable system and depends on the spring to close.
Also it is good to mention that you just did some work, when a problem happens. They are very often related. ;)

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Elmobile
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Re: 89 GL1500 choke stuck on?

Post by Elmobile » Tue May 14, 2019 8:55 am

The pictures are from the 1996 carbs that I just rebuilt (Randakk's kit). They went on my 1990 SE. Your 1989 carbs should be the same as far as the choke linkages work.
It is basically a push / pull cable taking care of the opening / closing of the choke (Hook up shown in green circle). So the cable tension adjustment is critical... It is done at the clip that can be seen on the left side picture (Red arrow)). There is a return spring on each side for the small forks shafts (Yellow circle on both pictures). When released, the forks must not apply any pressure on the plungers (Red arrow on right picture). There is also a spring inside the carbs to keep the plungers completely in when the choke is off.
You will have to remove the air filter box to get to this adjustment. I've done it before putting the carbs back on the insulators but I think you can get to it with the carbs still on (Again after removing the air box).
From your problem description, I would first check the cable adjustment...
Hope this help...
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Left side
Left side


Right side
Right side


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Elmobile
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Re: 89 GL1500 choke stuck on?

Post by Elmobile » Tue May 14, 2019 9:06 am

Reading your post again.
Rambozo is correct. Your issue may be related to the throttle cables rather than the choke. Easiest way to check that the throttle return to idle would be to see if the idle adjustment located next to your gas fill up does respond. If you can do more than 1/2 turn counter clockwise? (to decrease) and the idle does not respond than you know your throttles are not returning fully...
That will have to be fixed before worried about the choke.

Good luck...

nick2681
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Joined: Thu Mar 26, 2015 8:43 am
Location: Lebanon, PA
Motorcycle: 1989 GL1500

Re: 89 GL1500 choke stuck on?

Post by nick2681 » Tue May 14, 2019 12:52 pm

Rambozo wrote:
Tue May 14, 2019 8:36 am
The plot thickens.
Yes, there is a link between the choke and the throttle idle setting. The choke not only enriches the mixture, but also raises the idle speed. With a dual cable throttle you should be able to close a stuck throttle as one cable is made to do just that. Try turning off the choke, then close the throttle beyond where the spring stops it. It might be stiff, but you might find the idle will lower as long as you hold it. That assumes most of the throttle system is working, just binding. If you put it together really wrong, all bets are off. Either way you should take it back apart and make sure everything works smoothly, and there is no binding. Even cable routing can impact how it works. One cable pulls it open and one pulls it closed, so even if the return spring breaks, the throttle won't get stuck wide open. Unfortunately, the choke is only a single cable system and depends on the spring to close.
Also it is good to mention that you just did some work, when a problem happens. They are very often related. ;)
I didn't mess with cable routing or anything, literally just removed both cable ends from the grip (I was cleaning the starter button contacts using these directions https://www.goldwingfacts.com/1500startbutton.htm ) and replaced them when done. I had a hell of a time getting the "front" cable in and out...the one closest to you when seated and the one visible in that link...it had a lot of tension behind it. Now reinstalled it moves smoothly, no difference in motion/movement before or after.

So...are you suggesting I remove the cables from the grip again and then start the engine? Trying to visualize exactly what you're suggesting.
1989 GL1500

Former Rides:
1982 GL500 Interstate
1980 GL1100

First Ride: on the back of my late grandfather's 1985 GL1200LTD

nick2681
Posts: 12
Joined: Thu Mar 26, 2015 8:43 am
Location: Lebanon, PA
Motorcycle: 1989 GL1500

Re: 89 GL1500 choke stuck on?

Post by nick2681 » Tue May 14, 2019 12:53 pm

Elmobile wrote:
Tue May 14, 2019 9:06 am
Reading your post again.
Rambozo is correct. Your issue may be related to the throttle cables rather than the choke. Easiest way to check that the throttle return to idle would be to see if the idle adjustment located next to your gas fill up does respond. If you can do more than 1/2 turn counter clockwise? (to decrease) and the idle does not respond than you know your throttles are not returning fully...
That will have to be fixed before worried about the choke.

Good luck...
I had wanted to try that, but it seems that that knob doesn't want to move at all...when I went to twist it, that entire lil black hose wants to move too. And not wanting to use tools or mess with anything and end up breaking it, I just let it go and decided to come here to the forums for help.
1989 GL1500

Former Rides:
1982 GL500 Interstate
1980 GL1100

First Ride: on the back of my late grandfather's 1985 GL1200LTD

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WingAdmin
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1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer

Re: 89 GL1500 choke stuck on?

Post by WingAdmin » Tue May 14, 2019 3:28 pm

nick2681 wrote:
Tue May 14, 2019 12:53 pm
Elmobile wrote:
Tue May 14, 2019 9:06 am
Reading your post again.
Rambozo is correct. Your issue may be related to the throttle cables rather than the choke. Easiest way to check that the throttle return to idle would be to see if the idle adjustment located next to your gas fill up does respond. If you can do more than 1/2 turn counter clockwise? (to decrease) and the idle does not respond than you know your throttles are not returning fully...
That will have to be fixed before worried about the choke.

Good luck...
I had wanted to try that, but it seems that that knob doesn't want to move at all...when I went to twist it, that entire lil black hose wants to move too. And not wanting to use tools or mess with anything and end up breaking it, I just let it go and decided to come here to the forums for help.
That's ok if the whole thing rotates. Mine does the same thing, but the end result is the same: it still adjusts the idle screw. Just be careful not to adjust it too far outwards, as it will unscrew all the way.

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CrystalPistol
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1997 GL1500SE Lehman Trike

Re: 89 GL1500 choke stuck on?

Post by CrystalPistol » Tue May 14, 2019 5:31 pm

I see …. more info added!

Now, after reading the new posts & info ….. wondering if you for sure got cable ends properly seated at throttle grip end and that cables rest in the grooves? If you didn't mess with idle adjustment then when working on it, and seeing as "choke" is on far side of bike, away from the start button or throttle side controls.
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tim phelps
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Re: 89 GL1500 choke stuck on?

Post by tim phelps » Wed May 15, 2019 1:27 pm

if it isnt a choke why does it say choke on the lever?

Rambozo
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Re: 89 GL1500 choke stuck on?

Post by Rambozo » Wed May 15, 2019 4:35 pm

tim phelps wrote:
Wed May 15, 2019 1:27 pm
if it isnt a choke why does it say choke on the lever?
Because some people would have no idea what an "enrichment" lever is for. Enriching the fuel mixture is the primary purpose of a choke. It used to be done by choking off a portion of the air flow. The same effect can be had by increasing the fuel flow, like the GL1500. Now days it's usually done by software. However you do it, the effect is the same. It makes it easier to start a cold engine.

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ct1500
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Re: 89 GL1500 choke stuck on?

Post by ct1500 » Wed May 15, 2019 4:45 pm

tim phelps wrote:
Wed May 15, 2019 1:27 pm
if it isnt a choke why does it say choke on the lever?
Enrichment system would not fit in the space provided on lever. ;)

A conventional choke is a device that limits incoming air to the carburetor providing a rich mixture and will have a fast idle cam opening throttle plates to boost RPM. An enrichment system is a dedicated carb circuit that meters additional fuel AND air to aid cold starting leaving throttle plates closed at the base RPM.
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nick2681
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Re: 89 GL1500 choke stuck on?

Post by nick2681 » Wed May 15, 2019 7:54 pm

Finally got to do a little nosing around tonight. Bike starts right up and idles around 2000rpm, and increases to 2500 as it warms. The idle adjust knob didn't seem to do much of anything when turning counterclockwise, but seemed to increase the idle even higher if turned clockwise.

I took the left side of the handlebar apart to see what was going on with the choke cable knob, and the cable is not moving. Photos are attached. It seats in the groove perfectly when lowered to the "on" position but the cable bunches up when raised to the "off" position.

Next suggestion? Could the throttle still be involved? Or does this point back to the choke cable and that spring? (Or is it internal gunk holding things open inside?)
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1989 GL1500

Former Rides:
1982 GL500 Interstate
1980 GL1100

First Ride: on the back of my late grandfather's 1985 GL1200LTD

nick2681
Posts: 12
Joined: Thu Mar 26, 2015 8:43 am
Location: Lebanon, PA
Motorcycle: 1989 GL1500

Re: 89 GL1500 choke stuck on?

Post by nick2681 » Fri May 17, 2019 12:45 pm

SOLVED!!!!

There was rust/corrosion in the L-shaped tubing and the adjustment tube at the handlebar end that was causing the cable to seize. Cleaned it up and everything works great now!

And I changed the fuel filter, air filter, and spark plugs while everything was torn apart.

Thanks everyone!


1989 GL1500

Former Rides:
1982 GL500 Interstate
1980 GL1100

First Ride: on the back of my late grandfather's 1985 GL1200LTD

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