1980 GL 1100 loss of power during heavy rain


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Davebr
Posts: 2
Joined: Wed Jun 03, 2015 4:44 pm
Location: London, Ontario,Canada
Motorcycle: 1980, GL1100 Interstate

1980 GL 1100 loss of power during heavy rain

Post by Davebr » Wed Feb 27, 2019 12:48 pm



i have noticed that when there is heavy rain, my bike losses power. This has happened several times and it's frustrating. About 10 min. later the bike starts back up as if nothing was wrong. I have not checked on anything yet (been busy and not riding alot) .. wan to resolve this issue for this year. There is no water in the tank, plugs are fine (new 2 yrs ago). I have noticed that two electrical components look like the epoxy has melted. Other then that, everything is running just grand.

any suggestions.



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Maz
Posts: 586
Joined: Tue May 19, 2015 4:43 am
Location: Kent, UK
Motorcycle: 1975 GL1000K1
1976 CB500T
1979 CB750L
1990 Yamaha FJ1200
1993 Suzuki GS500E

Re: 1980 GL 1100 loss of power during heavy rain

Post by Maz » Wed Feb 27, 2019 1:10 pm

I suspect your coils are getting damp and 'tracking'. They dry out from engine heat when you leave the bike for 10 mins and it restarts fine. Try using a spray bottle to dampen them with the engine idling to see if this replicates the problem. If so, check the coil bodies for cracks. You can spray them with a water displacement maintenance spray (WD40 here in the UK) to keep the damp out, but if they are cracked, best to replace them.

The two electrical components are the spark units and they pretty much all melt the black goo out of the back! It doesn't affect their operation, but is designed to keep the internal components dry and help with heat transfer. You can pour some electronic potting compound in there and smooth it off before it dries or mix up some epoxy resin and use that (I did this on my CB750 dohc -same units) I also sprayed a bit of black paint into the mix to make it look original.

Maz
Last edited by Maz on Wed Feb 27, 2019 3:03 pm, edited 1 time in total.
Ironically, Common Sense is the LEAST common of all senses!

Davebr
Posts: 2
Joined: Wed Jun 03, 2015 4:44 pm
Location: London, Ontario,Canada
Motorcycle: 1980, GL1100 Interstate

Re: 1980 GL 1100 loss of power during heavy rain

Post by Davebr » Wed Feb 27, 2019 1:39 pm

Thanks Maz. I will look at this and see whats happening. I think it would be a good idea to change them out anyway.

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DenverWinger
Posts: 629
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: 1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: 1980 GL 1100 loss of power during heavy rain

Post by DenverWinger » Wed Feb 27, 2019 7:18 pm

'Nuther thing that can go bad on these is the sparkplug caps. I had to replace mine after a couple started snapping sparks from the cap to the head instead of thru the sparkplugs when it was wet.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

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Wilcoy02
Posts: 992
Joined: Sun Nov 21, 2010 11:37 pm
Location: Marengo, Ohio
Motorcycle: 1983 GL1100 I purchased 3/16

1983 GL1100I frame with an 80 engine. poor boy installed with C-5 ignition--DIED in Grande Prairie Alberta Canada 8/15


98 valkyrie sold 8/16

Re: 1980 GL 1100 loss of power during heavy rain

Post by Wilcoy02 » Wed Feb 27, 2019 8:07 pm

My 1100 did that and turned out to be cracked coil. If you have to replace the coils make sure you get the same# that is on the coils currently there. I did not and had problems until I got the right coils.

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CT1100
Posts: 16
Joined: Mon Jan 20, 2014 8:43 pm
Location: Hartford, Connecticut
Motorcycle: 1983 GL1100I original owner
2006 Harley Ultra Classic
1964 Yamaha YA6

Re: 1980 GL 1100 loss of power during heavy rain

Post by CT1100 » Thu Mar 07, 2019 9:11 pm

The first thing I would check is the easiest and that is to make sure the drain holes are clear in each spark plug well.



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