Missing Condenser on 77 !


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Shammon
Posts: 25
Joined: Sun Aug 06, 2017 4:48 pm
Location: Glasgow
Motorcycle: GL1000 1977

Missing Condenser on 77 !

Post by Shammon »



Hi,

After getting my 1977 rebuild and still learning a thing or two I have discovered it has no condenser fitted! :shock: (Part next to battery)
Crazy as it sounds I have overlooked this. I think this may be why it has been not running as it should but it has been running but sluggish and hesitant at low RPM. (I had suspected the spark plugs as cause which I was intending to change)

The bike came in bits and most was in boxes, and I've luckily found two condensers which are identical (Blue and yellow wire) in a box that I over looked. I am unsure as how best to test so Can any one advise me on the following.

1. What symptoms will a bike show with a missing condenser?
2. What is the resistance of the condenser (ohm) so I can test them to see what one to fit.

Thanks


Cover the basics and the technical will follow easily.
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jeffcosmo
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Location: Burlington, WI (Honey Lake)
Motorcycle: 1983 GL1100 Aspencade
1983 GL1100 Aspencade
1983 GL1100 Aspencade (parts bike)

Re: Missing Condenser on 77 !

Post by jeffcosmo »

You're lucky it runs at all.
Ignitions are not that finicky about condenser specs, so fit what you have and see what happens.
To test, as I was taught oh so many years back: using an analog volt-ohmmeter set to a resistance scale, touch the two leads, one to the body, the other to the condenser lead. The needle should pop up, and go back down. Do this the other war 'round (switch leads), and the needle should do the same. That's all the reading really necessary for a condenser to work in an ignition.

Cosmo
Shammon
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Joined: Sun Aug 06, 2017 4:48 pm
Location: Glasgow
Motorcycle: GL1000 1977

Re: Missing Condenser on 77 !

Post by Shammon »

Thanks.

Il go fit it tomorrow and see how things work out.
The bike has electronic ignition fitted (Not Dyna) but look like standard coils. its a "Newtronic" electronic ignition.
Cover the basics and the technical will follow easily.
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Maz
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Motorcycle: 1975 GL1000K1
1976 CB500T
1979 CB750L
1990 Yamaha FJ1200
1993 Suzuki GS500E

Re: Missing Condenser on 77 !

Post by Maz »

If you have electronic ignition, you don't use the condensers. That's probably why they were removed.
I fitted the Newtronic system to my 75 . It worked for about 6 months then I kept losing sparks to cylinders 1 and 2 when the engine got up to a decent temperature. If I removed the 'points'cover, it started working again. One of the optical sensors was failing when it got hot. I got a replacement sensor which worked, then the other one failed. I pulled the whole system off, put on a shelf in the garage and went back to points/condenser. Not had a problem since.
Maz
Ironically, Common Sense is the LEAST common of all senses!
Shammon
Posts: 25
Joined: Sun Aug 06, 2017 4:48 pm
Location: Glasgow
Motorcycle: GL1000 1977

Re: Missing Condenser on 77 !

Post by Shammon »

Thanks for that.

I may now consider also removing it and going back to its original points, I have also found these in a box.
Il need to study and find out how best to re wire it back to normal and try it as factory standard.
Cover the basics and the technical will follow easily.
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jeffcosmo
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Location: Burlington, WI (Honey Lake)
Motorcycle: 1983 GL1100 Aspencade
1983 GL1100 Aspencade
1983 GL1100 Aspencade (parts bike)

Re: Missing Condenser on 77 !

Post by jeffcosmo »

I'd suggest getting a service manual. Even a Haynes would likely have a diagram in the back.

Cosmo
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DenverWinger
Posts: 1737
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Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
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1983 Trav-Lite Camper (2010-)
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1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Missing Condenser on 77 !

Post by DenverWinger »

If you need a new condenser, even the condenser from a lawnmower ignition tune-up kit will work....
♫ 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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badandy
Posts: 79
Joined: Tue Nov 01, 2016 7:03 pm
Location: Weirton, West Virginia
Motorcycle: 1977 GL1000 Goldwing
1982 GL500I
1983 VT500 Shadow

Re: Missing Condenser on 77 !

Post by badandy »

The condensers keep the points from arcing during operation. It is just a simple capacitor that absorbs the higher voltage so it doesn't cross the point surfaces. It will run for a time , but the points will destroy themselves.

No need for them on electronic ignition.
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DenverWinger
Posts: 1737
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
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: Missing Condenser on 77 !

Post by DenverWinger »

Also along with the inductance of the coil sets up an oscillation in the coil, producing a hotter spark.
♫ 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
Shammon
Posts: 25
Joined: Sun Aug 06, 2017 4:48 pm
Location: Glasgow
Motorcycle: GL1000 1977

Re: Missing Condenser on 77 !

Post by Shammon »

Spent tonight planning the removal. not as complex as first thought.
Il post up a video tomorow when I put the points all back in, and hopefully it runs better. or the carbs are off again to check.
Thankfully I have all the parts required.
Cover the basics and the technical will follow easily.
Shammon
Posts: 25
Joined: Sun Aug 06, 2017 4:48 pm
Location: Glasgow
Motorcycle: GL1000 1977

Re: Missing Condenser on 77 !

Post by Shammon »

Spot on Maz,

I removed the entire electronic ignition and fitted the stock points and condenser today. And WOW fired up no hesitation and all running perfect. I also recon my Newtronics ignition was failing and hence was not giving right timing to engine despite me having the timing spot on with a strobe light.

Went out for a run and the bikes simply as it now should be, seriously low end power amazing. I also put a better link earth to the condenser when fitting.

Any way thanks all for the advice heres a video if it helps others too.


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Cover the basics and the technical will follow easily.
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Maz
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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: Missing Condenser on 77 !

Post by Maz »

Shammon, it sounds great! Sometimes it's worth reverting to 'old school '. I know some electronic ignitions are an improvement, but really, I'm more than happy to check and adjust points every once in a while if I'm repaid with a decent running engine.
I'm glad you got it sorted. Enjoy.
Maz


Ironically, Common Sense is the LEAST common of all senses!
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