My new to me 85 GL1200 Interstate


Information and questions on GL1200 Goldwings (1984-1987)
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themccrady
Posts: 10
Joined: Wed Jan 27, 2016 2:30 pm
Location: Sierra Vista, AZ
Motorcycle: 1985 GL1200 Interstate

My new to me 85 GL1200 Interstate

Postby themccrady » Thu Feb 04, 2016 7:33 pm



Hello Folks,
I recently traded my 98 Honda Shadow 600VLX for a 85 GL1200 Interstate. It was a case of I wanted a bigger bike after practicing for a year, and the old timer needed something smaller to still be able to stay on two wheels. I love all the extra room, and the Cadillac feel of the Wing! I have noticed two things though...

1. When climbing a hill, I start to lose speed, and downshifting does not really seem to help. I thought it was a fuel deliver issue, so I changed the fuel filter, and then changed the fuel pump and filter again. This did not correct the issue. I still have not checked to see if carbs are in sync, but have the tool available to do so. (Not entirely sure on what to do though) I added about 3/4 of a can of seafoam to a tank of gas to see if I could possibly clean the carbs a little as well. My gas mileage has started to improve, but I am getting a lot of smoke on start up as I kinda expected. I've seen a lot of discussions about this issue, but it seems as soon as the issue is fixed, there has been no follow up post.

2. When starting warm after riding some, the starter seems to crank very slow at first, and then starts to spin normally and the bike starts.

I am no mechanic by any means, but I love to work on my won stuff to save money. There is a local shop here in Sierra Vista AZ, that specializes in "Vintage Wings" but I want to make sure I check an do everything I can before I throw in the towel. Any advice you smart folks could give me, would be appreciated.

Cheers,

Jeff



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twocams
Posts: 554
Joined: Tue Sep 29, 2015 11:25 am
Location: Grants Pass, Oregon
Motorcycle: 1985 GL1200 Aspencade, 2003 K1200GT BMW, 1969 R69S BMW
Sold : 84 V65 Magna, 82 Moto Guzzi, XS 1100 Yamaha,84 Wing Int., 80 650 Special, Only new bike 82 XV750 Virago (Guam),Honda 250,84 R100RT BMW,87 K100 LT BMW,93 K1100 LT BMW, 91 535 Virago, Honda 50

Re: My new to me 85 GL1200 Interstate

Postby twocams » Thu Feb 04, 2016 11:29 pm

There are guys that have had that same problem with slow cranking starts on forum here. Use the search here to find remedies. Do a good old fashioned tune up. New spark plugs, sync the carbs, adjust carbs fuel mixture. Get a maintenance book or down load from this site. You can get a Clymer book used from Amazon for about $25 last I looked....or new for more$$. There a good old bike just need some TLC. Also change the timing belts If you dont know when changed last. If one breaks it can destroy the engine.

twocams

thompsoj22
Posts: 55
Joined: Sun Oct 18, 2015 8:00 am
Location: Ridgecrest CA
Motorcycle: 1986 Honda Goldwing GL1200I

Re: My new to me 85 GL1200 Interstate

Postby thompsoj22 » Tue Feb 09, 2016 12:01 am

how many miles on it, ive ridden bikes for 50 years and never had one that slowed down going uphill and downshifting didn't help unless something was fubar. if your not a mech than use a lot of patience! pull a plug and determine if the fuel delivery is correct, ie' lt brown good- grey blistered "lean". black "oil fouled or rich". so ive had a few beers and im chuckling at your situation! the hard part is over, you have committed and bought the bike! now fix the thing!!!! by your description I would start with cam timing " belts" verify cam timing is correct!. if you are slowing down going uphill and downshifting has no effect the bike is screaming for help!!!!!!!! :lol: hey your not trying to climb Everest with the bike are you? hey one more thing, I cant remember anything ive ever owned that didn't slow down going uphill???????????????????????????. dont get pissed, if I were there we would have it narrowed down in an hour. dont ride it till you fix it.

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deanbw
Posts: 278
Joined: Sun Nov 30, 2014 2:30 am
Location: puyallup,wa.
Motorcycle: 1986 gl1200a aspencade . Honda xl600r, '68 z50, '82z50, '80cx500c, '00 klr250

Re: My new to me 85 GL1200 Interstate

Postby deanbw » Tue Feb 09, 2016 4:30 pm

Probably carburation issue, has the bike been sitting? You may want to do the easy first, as said, tune it, sync it. Then look for vac leaks, but it would run fast idle if it had a vac leak you would think. I'm guessing carbs are going to need a rebuild, you may one not playing nice with the others.
Just for giggles you could pull the shelter (false tank) and look for cracked coils, but it sounds fuel to me.
There is a small vac tube that runs from I think number 4 carb to a "tee" from there it goes to the ignition mod for advance, the other from tee is plugged (access for tuning gauge), make sure you have no leaks there.

themccrady
Posts: 10
Joined: Wed Jan 27, 2016 2:30 pm
Location: Sierra Vista, AZ
Motorcycle: 1985 GL1200 Interstate

Re: My new to me 85 GL1200 Interstate

Postby themccrady » Wed Feb 10, 2016 8:59 pm

Hey guys,

Just wanted to follow up. Starter died on me, verified that by testing it. I ordered a rebuild kit, and I am in the process of rebuilding that. Just taking my time, doing a little each night. The positive brush was all but gone! Tons of carbon and gunk in it. By the way, that thing was a pain to get out until I realized I could pull the exhaust bolt out. My new timing belts and carb rebuild kits came in today. Gonna give her a full up service with new plugs and oil as well. Will post an update when I get her all put back together.

themccrady
Posts: 10
Joined: Wed Jan 27, 2016 2:30 pm
Location: Sierra Vista, AZ
Motorcycle: 1985 GL1200 Interstate

Re: My new to me 85 GL1200 Interstate

Postby themccrady » Fri Feb 12, 2016 7:29 pm

Well,

After a few days and plenty of trial and error, I rebuilt the starter and got it back on the wing. Works like a champ!




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deanbw
Posts: 278
Joined: Sun Nov 30, 2014 2:30 am
Location: puyallup,wa.
Motorcycle: 1986 gl1200a aspencade . Honda xl600r, '68 z50, '82z50, '80cx500c, '00 klr250

Re: My new to me 85 GL1200 Interstate

Postby deanbw » Fri Feb 12, 2016 10:22 pm

themccrady wrote:Well,

After a few days and plenty of trial and error, I rebuilt the starter and got it back on the wing. Works like a champ!




sweet, next it's time to go after those carbs

themccrady
Posts: 10
Joined: Wed Jan 27, 2016 2:30 pm
Location: Sierra Vista, AZ
Motorcycle: 1985 GL1200 Interstate

Re: My new to me 85 GL1200 Interstate

Postby themccrady » Mon Apr 11, 2016 3:21 pm

Just wanted to update on this thread. Yes, the carbs were really bad after i had a chance to take a look at them. The rubber valves that sit above the bowl, were all dry rotted so I knew i had a problem there. I ended up buying a known good carb set off of ebay, and had that rebuilt. Got it back on the bike and took her for a ride. I finally got to feel what that motor was capable of! I then started to have a cooling issue. Pretty damn sure my head gasket is blown on the right side now. I started a new thread for that one. Thsi bike is super fun to ride, and I cant wait until i trust it enough to really take her on a long ride !

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deanbw
Posts: 278
Joined: Sun Nov 30, 2014 2:30 am
Location: puyallup,wa.
Motorcycle: 1986 gl1200a aspencade . Honda xl600r, '68 z50, '82z50, '80cx500c, '00 klr250

Re: My new to me 85 GL1200 Interstate

Postby deanbw » Tue Apr 12, 2016 12:55 am

themccrady wrote:Just wanted to update on this thread. Yes, the carbs were really bad after i had a chance to take a look at them. The rubber valves that sit above the bowl, were all dry rotted so I knew i had a problem there. I ended up buying a known good carb set off of ebay, and had that rebuilt. Got it back on the bike and took her for a ride. I finally got to feel what that motor was capable of! I then started to have a cooling issue. Pretty damn sure my head gasket is blown on the right side now. I started a new thread for that one. Thsi bike is super fun to ride, and I cant wait until i trust it enough to really take her on a long ride !

sweet, sounds good. It is always nice when a problem gets found and fixed. Head gasket is not a big deal, a few hours on a weekend and you will back on the road.
Enjoy the ride

Saintjude33
Posts: 35
Joined: Wed Jun 10, 2015 7:47 pm
Location: Central CT
Motorcycle: 1986 GL1200 Aspencade with sidecar
1989 Yamaha XV250 Virago, Route 66 model

Re: My new to me 85 GL1200 Interstate

Postby Saintjude33 » Tue Apr 12, 2016 3:22 pm

You know, I have seen a lot of posts about power issues from these older wings- I had the same issue, and did the carb thing, but eventually something else popped up on my radar.

Clutch issues.

The return for the clutch was plugged, and there was a bit of water in the clutch fluid. We need to remember that the fluid in our clutch systems looooves water, and it compresses much differently than break fluid.

I drained all of the clutch fluid and cleaned it out, and the problem disappeared.

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deanbw
Posts: 278
Joined: Sun Nov 30, 2014 2:30 am
Location: puyallup,wa.
Motorcycle: 1986 gl1200a aspencade . Honda xl600r, '68 z50, '82z50, '80cx500c, '00 klr250

Re: My new to me 85 GL1200 Interstate

Postby deanbw » Wed Apr 13, 2016 2:06 am

Saintjude33 wrote:You know, I have seen a lot of posts about power issues from these older wings- I had the same issue, and did the carb thing, but eventually something else popped up on my radar.

Clutch issues.

The return for the clutch was plugged, and there was a bit of water in the clutch fluid. We need to remember that the fluid in our clutch systems looooves water, and it compresses much differently than break fluid.

I drained all of the clutch fluid and cleaned it out, and the problem disappeared.

Clutch fluid? Maybe I'm not reading this correctly but the clutch uses DOT 4 brake fluid....

Saintjude33
Posts: 35
Joined: Wed Jun 10, 2015 7:47 pm
Location: Central CT
Motorcycle: 1986 GL1200 Aspencade with sidecar
1989 Yamaha XV250 Virago, Route 66 model

Re: My new to me 85 GL1200 Interstate

Postby Saintjude33 » Wed Apr 13, 2016 8:27 am

Correct- it uses break fluid, but if I said I drained the break fluid out of my bike, someone would assume it was taken from the break system. I feel that anyone on these forums who is at the least moderately fluent in their GW understands that there really is no such animal as clutch fluid, but most people understand that they are the same thing. It's generally assumed across most mechanical forums that hydro clutches use some form of DOT-3 or DOT-4, from our vintage 'Wings all the way up to the 'Vette forum I monitor.

themccrady
Posts: 10
Joined: Wed Jan 27, 2016 2:30 pm
Location: Sierra Vista, AZ
Motorcycle: 1985 GL1200 Interstate

Re: My new to me 85 GL1200 Interstate

Postby themccrady » Wed Apr 13, 2016 9:07 am

Hmmm , I guess that's gonna get added to the punch out list for my wing. Shifts fine for now, but I'm trying to hit as much as I can so I can put some miles in her!

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Rednaxs60
Posts: 728
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD, 2008 GL1800

Re: My new to me 85 GL1200 Interstate

Postby Rednaxs60 » Thu Apr 14, 2016 5:17 pm

Wile you are looking at the clutch system, check the bushing in the clutch lever. After 31 years these wear, and can affect the clutch engagement as well. I changed mine and it made a big difference. Small cost, approximately $5.00 plus 30 minutes labour. Cheers
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

Saintjude33
Posts: 35
Joined: Wed Jun 10, 2015 7:47 pm
Location: Central CT
Motorcycle: 1986 GL1200 Aspencade with sidecar
1989 Yamaha XV250 Virago, Route 66 model

Re: My new to me 85 GL1200 Interstate

Postby Saintjude33 » Thu Apr 14, 2016 5:22 pm

Good point. I rebuilt my clutch and forgot to order one. Still a bit off, but at the top of the list.

The great thing about these old Wings- you don't really need to do much to them, even if they sat for a while.




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