Are we done here....?


Information and questions on GL1100 Goldwings (1980-1983)
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Psycheonabike
Posts: 191
Joined: Sun Feb 10, 2019 5:00 am
Location: England UK
Motorcycle: 1985 Aspencade

Are we done here....?

Post by Psycheonabike » Sat Jul 13, 2019 3:15 pm



GL1100 1982

Took carbs off for the 120th time (well it feels like that) this time to check float heights. Main problem is cylinder #2 not firing properly or at least not enough as plug is still sooty. So, current situation is this:

1. Carbs cleaned throughout
2. Carbs balanced
3. Valve clearances done
4. New plugs and gaps set
5. Ran REDEX (think Seafoam) through the tank twice
6. Timing checked and new belt fitted.
7. Checked coils and spark looks bright blue and consistent.
8. Mixture screws set to 2.5 and #1, #3 and #4 plugs look nice and golden brown.

...she is still sluggish and absolutely clunky when cold!! Feels like 90% when engine is eventually hot.

If I pull #2 plug there is a just about noticeable drop in revs and if I do this when riding I can feel the engine drop and then pull again when the plug is refitted. If I pull plug #4 the engine nearly stalls.

Then ONLY thing that seemed to make a significant difference was when I opened up the plug gap to over .35...she seemed to 'come to life'. But I am not sure that's still the case.

So, should I just be happy that she is running well enough to use or have I missed something? I REALLY don't want to start taking the engine out of changing valves. I don't have a garage and the weather here in the UK isn't kind enough to allow anything other than moderately advanced work outside.

Thanks in advance!

Tony



winguyjo
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Motorcycle: wing1 : 1982 gl1100 interstate; resurrection complete.
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wing3 : 81 gl1100i frame / 82 gl1100a engine/ 81cb900 odds & ends; resurrection complete. it's naked. SOLD.

Re: Are we done here....?

Post by winguyjo » Sun Jul 14, 2019 12:35 am

i would ...
a) check compression
b) switch spark plugs and wires around trying to make the issue move to another cylinder

Psycheonabike
Posts: 191
Joined: Sun Feb 10, 2019 5:00 am
Location: England UK
Motorcycle: 1985 Aspencade

Re: Are we done here....?

Post by Psycheonabike » Sun Jul 14, 2019 2:08 am

Move wires? You mean change the firing sequence??

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Maz
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Location: Kent, UK
Motorcycle: 1975 GL1000K1
1976 CB500T
1979 CB750L
1990 Yamaha FJ1200
1993 Suzuki GS500E

Re: Are we done here....?

Post by Maz » Sun Jul 14, 2019 5:02 am

Psycheonabike wrote:
Sun Jul 14, 2019 2:08 am
Move wires? You mean change the firing sequence??
Swap the wires and plugs on cylinders #1 and #2 (the front two). They both fire from the same coil so it won't affect the firing order, but if the fault moves to #1, you likely have a faulty coil or plug.
Maz
Ironically, Common Sense is the LEAST common of all senses!

Psycheonabike
Posts: 191
Joined: Sun Feb 10, 2019 5:00 am
Location: England UK
Motorcycle: 1985 Aspencade

Re: Are we done here....?

Post by Psycheonabike » Sun Jul 14, 2019 8:10 am

Sorry I am confused (not hard) !

Do you mean the first output from the coil now going to #1 should go to plug two and 2 to #2....?

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Maz
Posts: 658
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: Are we done here....?

Post by Maz » Sun Jul 14, 2019 9:37 am

As standard, one coil fires plugs 1and 2 (front right is 1, front left is 2) and the other coil fires 3 and 4 (rear right is 3, rear left is 4). If number 2 is the cylinder you are having issues with, swap the wires over from 1 and 2. If the problem moves to number 1 cylinder, you have a problem in the coil. If the problem stays on number 2, swap the spark plugs and see if the problem moves.
This is assuming your coils are already connected as I mentioned above, but It would barely run at all if they aren't!
Maz


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

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