Vacuum tube


Information and questions on GL1500 Goldwings (1988-2000)
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Melloreel
Posts: 50
Joined: Tue Nov 19, 2013 4:17 pm
Location: Coastal Ga.
Motorcycle: 1992 GL1500 aspencade
2009 Streetglide

Vacuum tube

Postby Melloreel » Thu Jan 30, 2014 4:23 pm



After watching a video on you tube it appears I have a vacuum leak? Video showed a pulsating idle same as mine. When replacing the hoses that have color tape on them should I try to order each one from Honda? I notice the parts fiche list bulk hose at the bottom? Is that for the long runs that are not color coded? Looks as though it will be mighty expensive to replace all the tubes!
Has anyone replaced ALL the vacuum hoses?
Thoughts.



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virgilmobile
Posts: 7644
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Vacuum tube

Postby virgilmobile » Thu Jan 30, 2014 5:18 pm

I replaced everything I could get my hands on...I took a 'sample' of each to my local auto parts store....a "real" parts place,not the after market bulk parts house.I think I bought 5' of each size.Something like $30 worth.
I found that I had hardened rubber hoses leaking at the point of contact with the metal nipples.
Also a deterioration inside the hoses where they make a sharp 90* bend...
Don't forget that there are small vacuum lines on the inside of the rear cylinder plenum tubes too.
I found a couple to the right of the carbs,just inside the frame...
you'll have to get the carbs completely out to get to the one under the rubber thermal mat.

Take lots of pictures...even my memory is running low on film. :D

Melloreel
Posts: 50
Joined: Tue Nov 19, 2013 4:17 pm
Location: Coastal Ga.
Motorcycle: 1992 GL1500 aspencade
2009 Streetglide

Re: Vacuum tube

Postby Melloreel » Thu Jan 30, 2014 7:15 pm

Thanks Virgil. But I'm still curious about changing from formed tubing to universal straight? Should I buy tape to match the oem colors? Will the straight kink, or collapse in some of the bends?
I'm not looking forward to doing this job, especially since I have taken the bike apart twice already :o I plan on this being the last complete tear down :roll: and I have looked at the carb removal in the manual, and I just don't see how it can be fun!

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virgilmobile
Posts: 7644
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Vacuum tube

Postby virgilmobile » Thu Jan 30, 2014 9:54 pm

I guess your idea of fun is different than mine.I look foreword to quality time with my hands in the bowles. of a bike :lol: Mostly knowing it will improve it.
I didn't worry bout the custom formed hoses.There's enough room to allow a larger bend.
Just cut them a bit long.
I always replace the hoses one at a time.It would be too easy to cross them up.

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Uncle Fester
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Joined: Tue Jun 26, 2012 6:21 pm
Location: Bethany, Ok, right off Route 66 !
Motorcycle: 1996 GL-1500 Cali model 'Wing, blue in color, named Ol'Blue

Re: Vacuum tube

Postby Uncle Fester » Thu Jan 30, 2014 10:29 pm

Whats the thought on using SILICON VACUME HOSE instead of rubber to replace everything ?
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Melloreel
Posts: 50
Joined: Tue Nov 19, 2013 4:17 pm
Location: Coastal Ga.
Motorcycle: 1992 GL1500 aspencade
2009 Streetglide

Re: Vacuum tube

Postby Melloreel » Fri Jan 31, 2014 6:00 am

I would think that it has to be much better than the rubber. But I think the cost versus benefit would be something to consider! In my case, I'm already in a little too deep so I'm trying to budget the rest of the refurb :shock:

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Uncle Fester
Posts: 1003
Joined: Tue Jun 26, 2012 6:21 pm
Location: Bethany, Ok, right off Route 66 !
Motorcycle: 1996 GL-1500 Cali model 'Wing, blue in color, named Ol'Blue

Re: Vacuum tube

Postby Uncle Fester » Fri Jan 31, 2014 7:54 am

I do not know how many MILES of this stuff would be needed, but here is a kit I found, and all the tubing can be got in about 5 or 6 different colors too. . . . !

http://www.amazon.com/U8901-3-03-Univer ... B00BQ0SDCU
Reputation is what other people know about you. Honor is what you know about yourself. Our stress about it happens when the two aren't the same. Be true to yourself and to hell with what everyone else thinks!

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amsoilguy
Posts: 117
Joined: Thu Jul 05, 2012 3:33 pm
Location: Boise, Idaho
Motorcycle: 1988 GL1500

Re: Vacuum tube

Postby amsoilguy » Sun Feb 02, 2014 4:00 pm

Don't forget to sync the carbs once you have it back together.
Allan

'88 GL1500

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WingRigger97
Posts: 9
Joined: Sat Sep 05, 2009 10:52 am
Location: Collinsville, OK
Motorcycle: 2009 GL1800PA/Comfort; 1997 GL1500A w/CS Friendship II Sidecar; 1975 GL1000

Re: Vacuum tube

Postby WingRigger97 » Mon Feb 03, 2014 1:48 pm

I have my '97 apart so I can perform the Randakk carb rebuild (great kit BTW). I have heard all about the vacuum hose issue, especially the one under the rubber mat that's beneath the carbs (Stu Oltman regularly mentions this one when working vacuum hoses on the 1500). Since I already have the bike torn apart this far, I thought about tackling this. I was taking a hard look at it this past weekend and it appears that there are several hoses that will require being disconnected in order to remove the mat, most specifically toward the front of the mat. Is there an easier way to access that hidden hose, or do I need to just suck it up and really dive into it? :?


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