1981 GL1100 engine changeover


Information and questions on GL1100 Goldwings (1980-1983)
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mcgyver2112
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1981 GL1100 engine changeover

Postby mcgyver2112 » Thu Mar 03, 2011 9:37 pm



I am getting ready to install an engine in my 81 GL1100. I have a leaky diaphram on the vacuum advance unit. I was under the assumption that this unit should hold vacuum, like a car distributor one. Some have been saying, if it leaks some, it's ok. I don't believe that. I am new to working on bikes. I have been a emergency vehicle technician fo over 20 years, so I have some mechanical knowledge. I do'nt want to put this motor in just to find out that I have to pull it out again to install a different advance unit. I was told that the part is not available from Honda. Does anyone have any extra parts laying around or know where I can obtain one. I am getting eager to get this bike running, and everytime I turn around, I run into a roadblock. Any help would be appreciated. Thanks
Greg


Last edited by mcgyver2112 on Fri Mar 11, 2011 9:19 pm, edited 1 time in total.

Old Fogey
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Re: 1980 GL1100 engine changeover

Postby Old Fogey » Thu Mar 03, 2011 10:38 pm

You are right, 'they' are wrong. I suggest you search eBay for 1100 dealers such as Whiteys or Odilidle.
Assuming you could turn up a new OEM one you would be looking at a $200 dollar part!
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Re: 1980 GL1100 engine changeover

Postby Old Fogey » Thu Mar 03, 2011 11:40 pm

Grab this quick! It's got the part you need on it.
http://cgi.ebay.com/ebaymotors/80-83-Ho ... 20b792906b
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Re: 1980 GL1100 engine changeover

Postby littlebeaver » Fri Mar 04, 2011 9:01 am

Hello maybe I can help, I actually rebuilt a vacuum advance using a car canister and it works great but you may only think it's leaking when it actually isn't, See, the auto vacuum canisters hold vacuum when putting a vac pump to it, you pump it up once or twice and the needle on the gauge stops and stays put, however, the vacuum canister on the goldwing is designed to bleed off air down to the correct settings then it holds a vacuum from that point..This will throw off the trained mechanic because they are used to it stopping and holding at the peak point after pumping..Put a mity vac to it and test it,,If you have a leak, that needle will tell you how big the leak is, pump it once or twice and watch the gauge needle bleed down then stop, if you have a leak in the diaphragm or a small hole it will slowly go down to nothing or zero from that point , if you have a big leak it will go faster or not hold a vacuum at all..Hope this helps you.. :D I wrote something on this in the 1100 section on this site, I have a video of the mity vac at work there..Good luck..Oh, I almost forgot, on the end of the canister there is a plug that covers the screw that adjusts the setting inside the canister, many times that seal or cap [epoxy] comes off, if you can see the screw on the end of the canister, that's your leak, seal it with jb weld or epoxy, put a small paper spit ball in the first so nothing will dribble down inside, let dry good and retest..Leak might just go away..

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Re: 1980 GL1100 engine changeover

Postby Old Fogey » Fri Mar 04, 2011 9:36 am

From the 1100 manual




So it seems we were wrong and littlebeaver is right; there is a limiting factor built into these units.
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Re: 1980 GL1100 engine changeover

Postby littlebeaver » Fri Mar 04, 2011 9:46 am

Those setting can be adjusted with the set screw on the end of the canister but be sure you seal it good when done. 3 out of 4 of the canisters I opened up had holes in the diaphragm..Just so guy's are aware..

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mcgyver2112
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Re: 1980 GL1100 engine changeover

Postby mcgyver2112 » Fri Mar 04, 2011 2:25 pm

littlebeaver,
I can't find your post with the mity vac video. I have a mity vac, so I going to restest and see if it actually is a good unit. I just saw the needle dropping and assumed it was no good. At a little over an inch of vacuum, it might be easy to not see that it is actually working. I hope it is, then I can resume installing this engine today. If not, I will have to get another and hold off for a few days. Thanks for the help.

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Re: 1980 GL1100 engine changeover

Postby mcgyver2112 » Fri Mar 04, 2011 2:27 pm

Oh yeah, this bike is an '81. I don't even know what year of bike I have. I did know last year when I joined this site, but I got older since then. Can you have senior moments at 51?

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Re: 1980 GL1100 engine changeover

Postby littlebeaver » Fri Mar 04, 2011 3:24 pm

mcgyver2112 wrote:Oh yeah, this bike is an '81. I don't even know what year of bike I have. I did know last year when I joined this site, but I got older since then. Can you have senior moments at 51?

Mine is also a 81, so you couldn't find it, at the top of this page hit the search button then it takes you to the advance search page key in vacuum advance on the forum section there on the bottom line and you will find it..it's down four or five topics look for Littlerbeaver on the right..Vacuum Advance check..good luck.. If you still can't see it, go to youtube and it's under 1981 goldwing vacuum advance test...

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Re: 1980 GL1100 engine changeover

Postby mcgyver2112 » Fri Mar 04, 2011 3:37 pm

Thanks, I'll look for it here first.

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Re: 1980 GL1100 engine changeover

Postby mcgyver2112 » Sat Mar 05, 2011 5:52 pm

I found the video on the vacuum advance test. I ran the test and it failed. I guess I'll get one from ebay and hope it passes the test.

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littlebeaver
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Re: 1980 GL1100 engine changeover

Postby littlebeaver » Sat Mar 05, 2011 8:27 pm

I guess it bled down all the way and didn't stop..As I said it's a crap shoot on ebay basically, unless the guy says he tested it and it holds a vacuum, but most I have seen don't say that..All the ones I opened had worn material and tiny holes, some with larger holes, I guess after 30 years they get tired..There's a lot of movement in that canister..I sent you a pm..I finally just made my own.. :D Hey is the cap on the back of the canister?

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Re: 1980 GL1100 engine changeover

Postby mcgyver2112 » Sun Mar 06, 2011 10:30 am

the cap was on the back. just for grins, I took it off and played with the adjustment....it still bled all the way down.

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Re: 1980 GL1100 engine changeover

Postby littlebeaver » Sun Mar 06, 2011 1:12 pm

Wow, it didn't even slow down? that's what I call a blow out.. :lol: I sent you a pm..

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Re: 1980 GL1100 engine changeover

Postby mcgyver2112 » Sun Mar 06, 2011 6:58 pm

It did slow down a little. I think I screwed it in quite a bit. I pumped it a couple of times and it started about 10in. and went down to 3-4 in. and then kept going down. Before, It started at 10 and wet down to zero pretty quick. I also have another one that doesn't hold any vacuum at all, but also, the rod seems to be frozen in the canister. Can that be possible. If you want I can send that one to you also. Thanks for your help.

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Re: 1980 GL1100 engine changeover

Postby littlebeaver » Sun Mar 06, 2011 9:08 pm

Yes it's very possible for the intire insides to be rusty, when it gets here I will open it up or operate and take photo's to show you how bad your part was...I'll rebuild it or fix it..Most guy's don't even know they have a leak and many believe it isn't an issue, I am not one of those guy's..Your leak will only get larger in time then your pickup coils won't move at all and that's half of your low rpm advance right there, you should also carefully remove the mechanical advance, spray it good with brake cleaner and make sure all the springs are moving fine and the dowel pin isn't broken, if that pin is broken the shaft won't spin[not good] and let it dry, lightly grease and put back in..
Last edited by littlebeaver on Thu Mar 10, 2011 12:34 pm, edited 1 time in total.

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mcgyver2112
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Re: 1980 GL1100 engine changeover

Postby mcgyver2112 » Mon Mar 07, 2011 5:43 pm

Oh, I'm trying not to forget anything when I put this engine in. I only want to do it once, and I want it to run right the first time!!!

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Re: 1980 GL1100 engine changeover

Postby imfree » Tue Mar 08, 2011 5:08 am

Before you waste time and money on your vacume advance ,Go check this out ,READ THE WHOLE THING. http://www.randakks.com/TechTip71.htm

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Re: 1980 GL1100 engine changeover

Postby imfree » Tue Mar 08, 2011 5:21 am

That web site wont work,Go to randakks.com scroll down to GL1100 boggs down at full throttle.This will tell you what to do for your vacume advance.Maybe this will work for your 1980.

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Re: 1980 GL1100 engine changeover

Postby Old Fogey » Tue Mar 08, 2011 8:32 am

Randakk's on holiday. He disables a lot of the site while he is away. He's back on the 10th March.
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Re: 1980 GL1100 engine changeover

Postby WingAdmin » Tue Mar 08, 2011 11:00 am


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littlebeaver
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Re: 1980 GL1100 engine changeover

Postby littlebeaver » Tue Mar 08, 2011 11:13 am

" I supposed people can do what they want, I noticed a big difference..And that's based on it not working before to it being fixed and fully functioning now..Hey block it off if you guys want, if some guys think they don't need it ...
Last edited by littlebeaver on Wed Mar 09, 2011 12:15 am, edited 1 time in total.

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Re: 1980 GL1100 engine changeover

Postby mcgyver2112 » Tue Mar 08, 2011 5:57 pm

Remember, I've been working on cars for 30 years and Fire Equipment for over 20........ If the engine has an advance unit on it, it was designed to work in sync with the fuel and ignition system to give you the best performance out of your engine. So, to tell me to block it off and not use it.....just because you can't get it anymore, just doesn't make sense. I hope they don't stop making tires or gasoline!!!!!!!!!!!

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Re: 1980 GL1100 engine changeover

Postby littlebeaver » Tue Mar 08, 2011 10:46 pm

Well, I think Mr. Honda had a plan to have a vacuum advance on his bikes, I just want to keep it running or working... Good luck Mcgyver, :D

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Re: 1980 GL1100 engine changeover

Postby imfree » Thu Mar 10, 2011 9:05 am

I am going to replace mine,Who knows maybe I will get better fuel mpgs,I can always use that.




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