Sudden power loss


Information and questions on GL1100 Goldwings (1980-1983)
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Cookindad
Posts: 9
Joined: Mon Jun 30, 2014 1:54 pm
Location: Elwood, In
Motorcycle: 1980 GL1100 Goldwing

Sudden power loss

Postby Cookindad » Wed Apr 29, 2015 12:02 pm



Cruising along enjoying a ride, all is well until like flipping a switch my power was all but gone. Luckily I was close to home. Bike will start right up, but rattles if I try to rev her up. I changed fuel filter and put in different gas, no change. Suggestions would be much appreciated.



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WingAdmin
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Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: Sudden power loss

Postby WingAdmin » Wed Apr 29, 2015 12:30 pm

A couple things I would try:

- Check the master (dogbone) fuse. A crack in this fuse can cause the bike to lose power, which means the ignition can not work well.

- Wait until the bike is cold, then start it and let it idle. Feel the exhaust headers (pipes coming out of the bottom of each cylinder) to see if one (or more) is cold, or at least not warming up as fast as the others.

Cookindad
Posts: 9
Joined: Mon Jun 30, 2014 1:54 pm
Location: Elwood, In
Motorcycle: 1980 GL1100 Goldwing

Re: Sudden power loss

Postby Cookindad » Wed Apr 29, 2015 2:00 pm

Thanks for the tip. I'll try it this weekend.

Cookindad
Posts: 9
Joined: Mon Jun 30, 2014 1:54 pm
Location: Elwood, In
Motorcycle: 1980 GL1100 Goldwing

Re: Sudden power loss

Postby Cookindad » Fri May 01, 2015 12:37 pm

Dogbone appears fine.
Cylinder temps are; #1 190, #2 130, #3 150, #4 190
Stalling and backfiring through the carbs.
I removed the wires from the coil on the 2-4 side to check the ohms. Was that a mistake?

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WingAdmin
Site Admin
Posts: 17050
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: Sudden power loss

Postby WingAdmin » Mon May 04, 2015 2:12 pm

No, that's fine (as long as you put them back!). While temps are not even across the board, you know that all cylinders are firing - at least part of the time.

I would pull each plug (one at a time) and see if you are getting a bright, healthy spark. I'm still leaning towards electrical, as those types of problems are the most likely to show up as a sudden (rather than gradual) failure.

Cookindad
Posts: 9
Joined: Mon Jun 30, 2014 1:54 pm
Location: Elwood, In
Motorcycle: 1980 GL1100 Goldwing

Re: Sudden power loss

Postby Cookindad » Mon May 04, 2015 3:19 pm

I just picked up a spark tester to do just that, Thanks.

Cookindad
Posts: 9
Joined: Mon Jun 30, 2014 1:54 pm
Location: Elwood, In
Motorcycle: 1980 GL1100 Goldwing

Re: Sudden power loss

Postby Cookindad » Thu May 28, 2015 1:59 pm

I found my CDI igniters had gotten hot enough to melt the resin. Do I simply replace the igniter and happy trails or do I need to dig deeper? What caused the igniters to overheat?

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WingAdmin
Site Admin
Posts: 17050
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: Sudden power loss

Postby WingAdmin » Fri May 29, 2015 10:42 am

Cookindad wrote:I found my CDI igniters had gotten hot enough to melt the resin. Do I simply replace the igniter and happy trails or do I need to dig deeper? What caused the igniters to overheat?


It's not overheating that causes this. It's simply breakdown of the potting compound after many years of repeated heat cycles. The result is that gooey mess that you find leaking out of them.

Just mix up some epoxy, fill them back up, let it cure, and you'll be good to go.




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