Bulk Vacuum Hose Lengths & Sizes


Information and questions on GL1500 Goldwings (1988-2000)
Post Reply
pocketchange
Posts: 102
Joined: Fri Aug 09, 2019 10:21 pm
Location: Houston, Texas
Motorcycle: 1994 GL1500 SE

Bulk Vacuum Hose Lengths & Sizes

Post by pocketchange »



Trying to locate a bulk length and size chart or listing for vacuum lines.
Being more than two dozen years old, I'm headed toward replacing
ALL of the vacuum hoses rather than second guessing their condition..
Metric I'm guessing.. pc



User avatar
AZgl1800
Posts: 2412
Joined: Thu Oct 30, 2008 2:46 pm
Location: Lake Oologah Indian Territory USA
Motorcycle: '02 GL1800
2009 Piaggio MP3 250cc

Re: Bulk Vacuum Hose Lengths & Sizes

Post by AZgl1800 »

metric hose is hard to find in local stores.

I just got the closest size I could find, and pushed it on hard, with a tiny dab of Vaseline on a Q-tip to lube the 1st 1/4 inch of hose before pushing it up over the nipple.

or, you could just order of each vacuum line from Honda, it is not all that expensive.
~John

'02 GL1800
2009 Piaggio MP3 250cc

User avatar
DenverWinger
Posts: 1530
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Bulk Vacuum Hose Lengths & Sizes

Post by DenverWinger »

Force-fitting a wrong size hose isn't necessarily the best idea... Premature failure possible, the hose may tend to split at the nipple as it ages.

It may take some searching (or just get some from Mother Honda) to find metric hose.

Funny, with the plethora of metric cars on the road metric hose is so hard to find. Unless the metric cars use SAE hose sizes????
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

User avatar
AZgl1800
Posts: 2412
Joined: Thu Oct 30, 2008 2:46 pm
Location: Lake Oologah Indian Territory USA
Motorcycle: '02 GL1800
2009 Piaggio MP3 250cc

Re: Bulk Vacuum Hose Lengths & Sizes

Post by AZgl1800 »

DenverWinger wrote:
Thu Nov 14, 2019 6:21 am
Force-fitting a wrong size hose isn't necessarily the best idea... Premature failure possible, the hose may tend to split at the nipple as it ages.

It may take some searching (or just get some from Mother Honda) to find metric hose.

Funny, with the plethora of metric cars on the road metric hose is so hard to find. Unless the metric cars use SAE hose sizes????
I have wondered about this for many years, why don't the auto stores stock Metric hose?
~John

'02 GL1800
2009 Piaggio MP3 250cc

User avatar
dingdong
Posts: 3934
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500A
2004 NRX1800 Rune SOLD

Re: Bulk Vacuum Hose Lengths & Sizes

Post by dingdong »

Here is some info from another site.
https://www.goldwingfacts.com/threads/g ... st-2611290

User avatar
Snowmoer
Posts: 165
Joined: Fri Jan 25, 2013 12:23 pm
Location: Cedar City UT
Motorcycle: 2012 GL 1800
1977 GL 1000
2012 KLR 650

Re: Bulk Vacuum Hose Lengths & Sizes

Post by Snowmoer »

Do not get SAE hose from the auto parts store! it is to small or to big. As stated, the to small hose will crack and fail over time.

I got my metric bulk hose on Amazon. Just type in 3.5 mm (4.5, 5.5) Metric Vacuum Hose. Honda uses 3.5, 4.5 and 5.5 mm for most of the hoses. A few of them you need to get from Honda. Get the Honda hose for the one under the carb that is shaped in a S. Some of the hoses have bends in them and can pinch if not formed. On a few that are no longer available, I just used a little extra hose so it curved and it did not pinch.

For the length, just take off the old hose and put the new hose next to it and cut to length. For the 4.5 size, get 20 feet. I only got 10 feet and ran out.

Here are the parts fiche to show the sizes and lengths. I just picked a year, so to be sure, pull up the fiche for your bike year.

https://www.hondapartshouse.com/oempart ... 9/tubing-2

https://www.hondapartshouse.com/oempart ... 8/tubing-1

Just a heads up. You will need to take apart a lot of the bike to get to theses hoses. I also replaced all the coolant hoses while I was at it on my 88. I had the fans, carb, and radiators off the bike. It made it much easier to get to everything.



Post Reply