Vacuum lines


Information and questions on GL1500 Goldwings (1988-2000)
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wingthing88
Posts: 47
Joined: Mon Apr 15, 2013 6:00 am
Location: Indianapolis, Indiana
Motorcycle: 1988 gl1500

Vacuum lines

Postby wingthing88 » Fri May 06, 2016 10:57 am



Well I have about 60k on my baby ('88 1500) since I last cleaned the carbs and she starting to hessitate a little and my milage has dropped some so it's time to go through them again. I would like to replace all of the vac lines while I'm there is there anyone out there that knows the size or sizes I need and aprox feet so I can pre order a spool or two before I work on it? I've searched the site and haven't found the answer. Thanks.



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virgilmobile
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Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
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84 GL 1200 I

Re: Vacuum lines

Postby virgilmobile » Fri May 06, 2016 1:11 pm

Whew.As I remember I had the same problem.Fortunately I have a auto supplier near me that has a large supply of various vacuum lines on spools.I removed a couple and let them match them.I purchased 6' of each size.About $15 total.Ended up making a second trip for the oddball one.All and all it was a weekend project.
Don't forget the one under the black rubber mat and the smaller ones attached to the intake runners.

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RBGERSON
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Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: Vacuum lines

Postby RBGERSON » Fri May 06, 2016 5:50 pm

also using a barbed elbow instead of making the beds in the tight corners may serve you well..the Honda tubes are preformed..stock tubing is not and the tight 90* can crimp the tubes..
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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Snowmoer
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Location: Yucca Valley, California
Motorcycle: 2012 GL 1800
1988 GL 1500
1977 GL 1000
1988 NX 650

Re: Vacuum lines

Postby Snowmoer » Fri May 06, 2016 10:14 pm

I do not remember the sizes, but the hoses are metric. I do remember that depending on what you want to replace, there were two sizes. Take a look at any on line parts place and look them up. It will list the size in the part discerption. I could not find a hose that fit right at the local parts stores. I got mine on Amazon in 10 foot lengths. I replaced all of them (carb and everything else) and used about 20'. Get the one that sits under the carb from Honda. It is formed and the bends are tight.

GillesGLW
Posts: 102
Joined: Fri Mar 20, 2015 6:52 am
Location: Switzerland
Motorcycle: 1989 GL 1500

Re: Vacuum lines

Postby GillesGLW » Sat May 07, 2016 11:20 am

Hello,

I completed the overhaul of my carb just a month ago and I can tell you that you will need the following for the vaccum lines:
- 4 mm
- 5 mm
- 6 mm
- 8 mm

With the above dimensions, you should be able to change all the vaccum lines. For the lines that are bended, just make them a bit longer to avoid any issue.
I've also changed the rubber mat, it was quite expensive (about 120$ here in Switzerland).

Cheers,
Gilles




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