Carb hoses.


Information and questions on GL1500 Goldwings (1988-2000)
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Csj992
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Motorcycle: 1990 GL1500l w/2012 Champion trike kit, 1998 Harley Road King.

Carb hoses.

Postby Csj992 » Sun Jul 24, 2016 9:11 am



I have developed a vacuum leak on my 1990 gl1500l. While looking through the many hoses I noticed the the drain hose T (part #19 on blowup) has one side open. I was wondering if that is nomal. Also, is that heat blanket really necessary? Thanks. Still haven't found vacuum leak.


Getting too old to have so many old vehicles. :P

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MikeB
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Re: Carb hoses.

Postby MikeB » Sun Jul 24, 2016 11:08 am

The open "T" is normal.

Is the heat blanket is necessary? I will have to assume that the designer and manufacturer believe it is. I'm only a rider and I am comfortable with it.
MikeB
Tacoma, WA, USA

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ct1500
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Re: Carb hoses.

Postby ct1500 » Sun Jul 24, 2016 8:42 pm

MikeB wrote:The open "T" is normal.

Is the heat blanket is necessary? I will have to assume that the designer and manufacturer believe it is. I'm only a rider and I am comfortable with it.


+1

To the OP what makes you know the engine has a vacuum leak?
This is what I do
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dingdong
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Re: Carb hoses.

Postby dingdong » Mon Jul 25, 2016 7:15 am

Common vacuum hose leak.
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Csj992
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Re: Carb hoses.

Postby Csj992 » Mon Jul 25, 2016 7:38 am

ct1500 wrote:
MikeB wrote:The open "T" is normal.

Is the heat blanket is necessary? I will have to assume that the designer and manufacturer believe it is. I'm only a rider and I am comfortable with it.


+1

To the OP what makes you know the engine has a vacuum leak?

Hey CT. The tall port in the right carb can be blocked and the idle smooths out. I also sprayed some contact cleaner around the base of the carbs and the idle smoothed out. I am only going on what I have read. I was overwhelmed with all the hoses on these cycles. Any help would be greatly appreciated. Thanks, Charlie
Getting too old to have so many old vehicles. :P

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Csj992
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Re: Carb hoses.

Postby Csj992 » Mon Jul 25, 2016 7:41 am

dingdong wrote:Common vacuum hose leak.

I wish that had been my problem, Tom. I've checked all easily accessible hoses with a vacuum pump and haven't found anything yet.
Getting too old to have so many old vehicles. :P

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RBGERSON
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Re: Carb hoses.

Postby RBGERSON » Mon Jul 25, 2016 7:54 am

There are a couple of 90* bends in the tubes under the carbs..that are know problem points. But they require removing the carbs to get at them..good pics in the Honda shop manuals.
HAD LOTS OF GOLDWING 75-83
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ct1500
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Re: Carb hoses.

Postby ct1500 » Mon Jul 25, 2016 8:21 am

Csj992 wrote:Hey CT. The tall port in the right carb can be blocked and the idle smooths out. I also sprayed some contact cleaner around the base of the carbs and the idle smoothed out. I am only going on what I have read. I was overwhelmed with all the hoses on these cycles. Any help would be greatly appreciated. Thanks, Charlie


Well that means the right side is running lean. You gotta go easy on the spray because if you flood the area it will wind up being sucked back into the carb intake tricking you into thinking a vacuum leak was found. If it really is a vacuum leak one little pinpoint spray at source of leak will give an immediate change in idle which in your case is most likely the carb insulator rubber. Keep vacuum hoses attached to air box and place box out of the way.

More often than not lean running is caused by carb problems.
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

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Csj992
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Re: Carb hoses.

Postby Csj992 » Mon Jul 25, 2016 8:32 am

ct1500 wrote:
Csj992 wrote:Hey CT. The tall port in the right carb can be blocked and the idle smooths out. I also sprayed some contact cleaner around the base of the carbs and the idle smoothed out. I am only going on what I have read. I was overwhelmed with all the hoses on these cycles. Any help would be greatly appreciated. Thanks, Charlie


Well that means the right side is running lean. You gotta go easy on the spray because if you flood the area it will wind up being sucked back into the carb intake tricking you into thinking a vacuum leak was found. If it really is a vacuum leak one little pinpoint spray at source of leak will give an immediate change in idle which in your case is most likely the carb insulator rubber. Keep vacuum hoses attached to air box and place box out of the way.

More often than not lean running is caused by carb problems.

Thanks for the replies. CT I was coming home and felt a surge in the bike, came home running good. Bike sat for a couple of hours and when cranked I noticed rpms surging at idle and a very slight miss at higher rpms. This is the problem I am hunting. Thanks, Charlie
Getting too old to have so many old vehicles. :P

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FM-USA
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'91 GL1500-I (Dbl-Darkside)
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MADE_IT!_200K_Oct_17/2016
iRide 24/365 99% SmileMiles
================
"You don't buy yourself a
HD to be SATISFIED,...
you buy it to keep your
HD friends PACIFIED."
================
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Re: Carb hoses.

Postby FM-USA » Mon Jul 25, 2016 8:59 am

Csj992 wrote:.. .. Also, is that heat blanket really necessary?

It's not ABSOLUTELY necessary but it does thwart overheating the carbs and it's fuel lines.
Ever have vapor lock on the road? Takes about 20-30 minutes before it's cool enough to ride again.
The Wings motor is a large, square and flat heat source and where the carbs are the most heat is.
If yours is missing, cut up an inner tube from a car, truck or wheel barrel.

Is your petcock and its vac line good? 1990 is prime for the petcocks diaphragm to leak.
If the diaphragm has minor hole(s), PM me and I'll explain a temporary fix.
"OIL CHANGE?" _FM 07-2009
Know its new taste and be loyal, you'll know when to change that oil.
Taste testing as the miles flow, souring as that acid grows.
And don't flirt with dirt or darkened oil, all the faster your engine will spoil.

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Re: Carb hoses.

Postby hugger-4641 » Mon Jul 25, 2016 8:00 pm

You may not have a leak, There is hose with a 90% bend on top of the LEFT cylinder head that was collapsed on mine and caused the same problem you are having. It was also causing my cruise control to act a little funny and not maintain speed setting sometimes. The hose wasn't leaking, just collapsed in the bend, and new hose fixed it.

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Csj992
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Re: Carb hoses.

Postby Csj992 » Tue Jul 26, 2016 7:29 am

hugger-4641 wrote:You may not have a leak, There is hose with a 90% bend on top of the LEFT cylinder head that was collapsed on mine and caused the same problem you are having. It was also causing my cruise control to act a little funny and not maintain speed setting sometimes. The hose wasn't leaking, just collapsed in the bend, and new hose fixed it.

I believe I checked that one hugger. I even removed the airvent duct so I could get a better view of all the plumbing in there. Thanks, Charlie
Getting too old to have so many old vehicles. :P

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hugger-4641
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Re: Carb hoses.

Postby hugger-4641 » Tue Jul 26, 2016 4:22 pm

Hopefully you checked it while it was running, I wouldn't have noticed mine collapsing otherwise because it looked fine while not running.

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Csj992
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Re: Carb hoses.

Postby Csj992 » Tue Jul 26, 2016 6:21 pm

hugger-4641 wrote:Hopefully you checked it while it was running, I wouldn't have noticed mine collapsing otherwise because it looked fine while not running.

I did not do that, but as soon as I get the carbs back on I will. Thanks for that.
Getting too old to have so many old vehicles. :P

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Csj992
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Re: Carb hoses.

Postby Csj992 » Sun Jul 31, 2016 8:55 pm

Well guys, got it fixed. After removing a ton of parts and pieces looking for a vacuum leak, it was suggested that I check my petcock valve. Well I did and sure enough the large diaphragm was busted. Installed a rebuild kit, put the carbs back on, fill it with antifreeze and cranked that joker up. Runs like a sewing machine. Now all I have to do is put all those parts back on and I'm on the road again. Thanks to all for your suggestions, Charlie
Getting too old to have so many old vehicles. :P

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FM-USA
Posts: 2008
Joined: Wed May 18, 2011 8:40 am
Location: USA-ILL-60085
Motorcycle: .
'91 GL1500-I (Dbl-Darkside)
Acquired:__51K_Jun_??/2007
MADE_IT!_200K_Oct_17/2016
iRide 24/365 99% SmileMiles
================
"You don't buy yourself a
HD to be SATISFIED,...
you buy it to keep your
HD friends PACIFIED."
================
|
ANTAGONISTS need not post.
|
==================

Re: Carb hoses.

Postby FM-USA » Sun Jul 31, 2016 8:57 pm

Glad we were here as a TEAM to help you! 8-)


"OIL CHANGE?" _FM 07-2009
Know its new taste and be loyal, you'll know when to change that oil.
Taste testing as the miles flow, souring as that acid grows.
And don't flirt with dirt or darkened oil, all the faster your engine will spoil.


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