1985 1200 interstate shutting down after 10 mins. of riding.


Information and questions on GL1200 Goldwings (1984-1987)
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Barry J.W.
Posts: 12
Joined: Sun Sep 13, 2009 12:37 pm
Location: Newfoundland,Canada
Motorcycle: 1985 goldwing interstate
1977 Cb750

1985 1200 interstate shutting down after 10 mins. of riding.

Postby Barry J.W. » Sun Jun 05, 2011 8:18 am



I have a 85 wing with 56,000 kms. and having a problem with it shutting down. Some times with it just idleing in the driveway for 5 mins. it will shut down. Some times it will idle for 30 mins.and won't shut down but take it on the road and run it for 5 mins. and it shuts down. When it shuts down sometimes it will start up right a way but sometimes I have to wait at least 30 mins.I removed one plug wire and put a screw driver in the plug cap and grounded to a bolt on the engine and it had no fire. Last year I was reading one of your sites here and it was talking about the stator plug in. I checked it and it was starting to get bad with corrosion and starting to melt so I replaced all the damaged wires. The battery seems to be just fine,no problems winding the engine over.I was wondering if this could be a stator problem? Sometimes the engine will backfire when trying to start,maybe that is just the access gas that it is not able to burn off,not sure. If anyone has any ideas what the problem may be it would be a great help. Thanks guys.


"Save gas ride a biker"!

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virgilmobile
Posts: 7663
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: 1985 1200 interstate shutting down after 10 mins. of rid

Postby virgilmobile » Sun Jun 05, 2011 11:45 am

There is a intermittent spark problem affecting both coils.
1. No , the problem is not related to the stator wires or plug,however,next to the stator plug is the plug from the ignition pickup coils.Check and clean it up.
2. It may be loosing power to the ignition system.
Use a test light to test that.I have my doubts that it's related to the coils,however it can be the ignition module.
Here's a schematic.
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Barry J.W.
Posts: 12
Joined: Sun Sep 13, 2009 12:37 pm
Location: Newfoundland,Canada
Motorcycle: 1985 goldwing interstate
1977 Cb750

Re: 1985 1200 interstate shutting down after 10 mins. of rid

Postby Barry J.W. » Sun Jun 05, 2011 1:03 pm

Thanks Virgilmobile,i hope that maybe the problem. I will try and get at that tonight. I will let you know the results when i get finished with it...Thanks again. Have a great day.
"Save gas ride a biker"!

Barry J.W.
Posts: 12
Joined: Sun Sep 13, 2009 12:37 pm
Location: Newfoundland,Canada
Motorcycle: 1985 goldwing interstate
1977 Cb750

Re: 1985 1200 interstate shutting down after 10 mins. of rid

Postby Barry J.W. » Mon Jun 06, 2011 2:58 pm

Hi Virgilmobile, I got at my bike last night and checked out what you suggested.I didn't find any corrosion or rust in the conections. The readings on the test light were,there are 7 terminals on the module,at the top off the module. by the clip lock on the right term. i got a dull light reading. On the bottom 2 terms i got left and right i got a normal bright reading. With the engine started i removed the module and got the same reading. Do this sound normal or not? There were 2 serial # on the module KK17 and MG9-A is this the right module.
"Save gas ride a biker"!

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virgilmobile
Posts: 7663
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: 1985 1200 interstate shutting down after 10 mins. of rid

Postby virgilmobile » Mon Jun 06, 2011 3:38 pm

I'll measure mine tonight so we have a working unit to measure from.
One wire is battery hot,2 wires return from the coil and can be lower volts.
I'll look an the numbers and post tonight

Barry J.W.
Posts: 12
Joined: Sun Sep 13, 2009 12:37 pm
Location: Newfoundland,Canada
Motorcycle: 1985 goldwing interstate
1977 Cb750

Re: 1985 1200 interstate shutting down after 10 mins. of rid

Postby Barry J.W. » Mon Jun 06, 2011 5:49 pm

Hi Virgilmobile,thanks for the return,I'll check back again tomorrow.
"Save gas ride a biker"!

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virgilmobile
Posts: 7663
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: 1985 1200 interstate shutting down after 10 mins. of rid

Postby virgilmobile » Mon Jun 06, 2011 9:06 pm

Here's a schematic with the volts.the bike was not started.I measured the voltages with a cheep DVM using the green wire as the ground instead of the frame.
When the bike quits you measure the 12 volt source to the ignition module between the white/black and the green wire,don't use the frame for ground.
If 12 volts are there.the next measurement needs to be the pulse coils.It's on the left side of the battery.4 wires,2 for each pulse coil white/yellow,yellow and white blue/blue.Mine measure 1000 ohms.
If all tests good when it dies then the ignition module is most likely failing.I've not pulled the cover to see how it's made.If you suspect that,I'll look into it.I've found cold solder connections cause intermittent problems,but I don't know if we can get to the board yet.

Barry J.W.
Posts: 12
Joined: Sun Sep 13, 2009 12:37 pm
Location: Newfoundland,Canada
Motorcycle: 1985 goldwing interstate
1977 Cb750

Re: 1985 1200 interstate shutting down after 10 mins. of rid

Postby Barry J.W. » Tue Jun 07, 2011 2:29 pm

Thanks again,i'll try this later tonight.I will let you know the results later.
"Save gas ride a biker"!

User avatar
virgilmobile
Posts: 7663
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: 1985 1200 interstate shutting down after 10 mins. of rid

Postby virgilmobile » Wed Jun 08, 2011 3:31 pm

I just looked at my post and it didn't have the pix.Oh well ,I measured using the green wire as the ground.I fount 12.1 volts going to the module and 9.3 volts on 2 wires that go to the coil.
I hope you can measure this after the bike quits and obviously not running.
The 2 wires that feed the coils,while running,have a very large voltage pulse on it(300-400 volts).

User avatar
virgilmobile
Posts: 7663
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: 1985 1200 interstate shutting down after 10 mins. of rid

Postby virgilmobile » Wed Jun 08, 2011 7:09 pm

Well,here's the pix I mentioned.
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User avatar
virgilmobile
Posts: 7663
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: 1985 1200 interstate shutting down after 10 mins. of rid

Postby virgilmobile » Thu Jun 09, 2011 3:47 pm

I'm looking into another "in use " test method other than expensive equipment.
I'm thinking a cheap analog meter monitoring the pulse coil signal.It cant be but a few volts.
also using a cheap neon test light for home AC use.I'd connect it across the wires feeding the coils.
It has no load and will light with the 300 volt pulse.
A DVM across the power leads to measure the 12 volts.
That way,when it quits,We can see which one fails without jumping about with a meter.

Even having to buy all the equipment would cost about $20 at Harbor freight.

Now if it will only quit raining as soon as I get home.EVERY NIGHT THIS WEEK




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