84 gl1200a


Information and questions on GL1200 Goldwings (1984-1987)
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wingman2
Posts: 6
Joined: Mon Apr 10, 2017 2:51 pm
Location: illiinois
Motorcycle: 1984 gl1200a

84 gl1200a

Post by wingman2 » Mon Apr 10, 2017 3:00 pm



hi guys, got a 84 wing bike runs but not well i lose spark in cyl 2 and three. and help would be great.



wingman2
Posts: 6
Joined: Mon Apr 10, 2017 2:51 pm
Location: illiinois
Motorcycle: 1984 gl1200a

Re: 84 gl1200a

Post by wingman2 » Thu Apr 20, 2017 1:02 pm

hi guys just got a 84 goldwing bike has no spark coils check out stator and pulse gen are good poss bad cdi. any advise thanks

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virgilmobile
Posts: 7924
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: 84 gl1200a

Post by virgilmobile » Thu Apr 20, 2017 3:13 pm

There's just a couple parts used to make a good spark...The coils,Ignition module,pulse coils and POWER...
It's absolutely necessary that it has the proper voltage to operate it.
With your volt meter..attach its leads directly to the 4 wire plug feeding the ignition module..Positive lead on the black and negative lead on the green.Crank the bike..Voltage should stay above 10.5 volts to get a robust spark.
Do not use the frame or battery post for the meter ground please.Probe the green wire directly at the module.Corroded ground connections are possible.
a bad/corroded KILL switch can also interrupt the current path to the ignition.
Look for corroded connectors at the ignition module AND at the 4 wire pulse coil connector to the right of the battery...Had that on mine...white powder in the connector killed the pulses to the module.

wingman2
Posts: 6
Joined: Mon Apr 10, 2017 2:51 pm
Location: illiinois
Motorcycle: 1984 gl1200a

Re: 84 gl1200a

Post by wingman2 » Fri Apr 21, 2017 8:02 am

hi virgilmobile wingman2 here. took your advise i got volts 10.5 at plug. went threw the bike yesterday and checked everything out, all test came back with in specs, the bike will start and run ok when cold as it warms up cyl# 1 and 2 have weak spark, the coil for those cyls are getting a pluse from cdi unit, even if coil tsets are good can that coil be breaking down as it gets warm ,or is the cdi unit acting up? any ideas would be great thank you. i also checked PG when cold and hot omhs the same.

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virgilmobile
Posts: 7924
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: 84 gl1200a

Post by virgilmobile » Fri Apr 21, 2017 9:37 am

I do hope that the volts did come up above 12 volts when it was acting up?

wingman2
Posts: 6
Joined: Mon Apr 10, 2017 2:51 pm
Location: illiinois
Motorcycle: 1984 gl1200a

Re: 84 gl1200a

Post by wingman2 » Fri Apr 21, 2017 10:29 am

yes it stayed above 12 volts

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virgilmobile
Posts: 7924
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: 84 gl1200a

Post by virgilmobile » Fri Apr 21, 2017 11:54 am

The last time I had a weak spark it was caused by a bad ignition coil but I was able to compare it with a working one.
I do suspect the coils.The only test other than substitution is a resistance measurement when there working (cold) and again when they act up (hot).
Generally when a ignition module is bad,its bad..
This problrm is sounding more like lack of power to the coils (tested OK) or the coils themselves.
In my best opinion you understand.

wingman2
Posts: 6
Joined: Mon Apr 10, 2017 2:51 pm
Location: illiinois
Motorcycle: 1984 gl1200a

Re: 84 gl1200a

Post by wingman2 » Wed Apr 26, 2017 10:36 am

hi virgilmobile wingman2 here finally got more time took work my wing after goining over it did all test found fault coil for cyl 1 and 2 . got new coils on order should be here today. ill post with results . thanks for all the help.

wingman2
Posts: 6
Joined: Mon Apr 10, 2017 2:51 pm
Location: illiinois
Motorcycle: 1984 gl1200a

Re: 84 gl1200a

Post by wingman2 » Thu Apr 27, 2017 9:22 am

hi virgilmobile wingman2 here got my coils in yesterday bike running great thanks for help

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virgilmobile
Posts: 7924
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: 84 gl1200a

Post by virgilmobile » Thu Apr 27, 2017 10:20 am

Great job.Learn something new every day.



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