GS650G Coils wax, resistance check and info?

[Guest]

While doing cleanup on the project bike, I removed the coils for cleaning and noticed what appears the remnants of a wax like coating on the coil bodies, water protection? There was little left of it remaining on the coils, I wouldn't think these require a wax dip before going back into service?

Doing the resistance check on the coils according the book, I can get resistance across the connector ends (4 ohms) but nothing showing (infinity and beyond) from the ends of the leads. Am I missing something?

When I received the bike, the spark plug cables were disconnected. Though I've marked each coil left and right, I have no idea to which spark plug each lead goes to.. I did notice the leads were marked 1-3 and 2-4.

Would I be correct to assume that the left coil 1-3 lead goes to cylindre 1 and the 2-4 lead goes to cylindre 2, and the right coil lead 1-3 goes to cylindre 3 and 2-4 lead to cylindre 4?

Though I rode bikes in the late 70s and early 80s I didn't do any maintenance on them.. rode them and sold them for the next bike.. I'm finding a lot of curious things done back then that aren't done on today's bikes.. and a lot of similarities.. Interesting.

[chef1366]

Check resistance with the plug boots removed.
Coils 1&4 and 2&3

[Seaking]

Check resistance with the plug boots removed.
Coils 1&4 and 2&3

Thanks.. I pulled the boots off and still can't get anything rolling for a reading.. either both dead or I'm still doing something wrong which is most likely..

As for coil leads, do I understand it correctly that left hand coil lead that read 1-3 goes to cylinder 1 and the lead that reads 2-4 goes to cylinder 4? Basically each coil crossed over the centre line with one lead?

Cheers

[BigD_83]

Yes, that is correct. One lead from each coil will cross over to the other side.

Try snipping off 1/4" of the leads. Sometimes they corrode at the ends. Strange that you wouldn't get any reading at all. On what range is the meter set?

As for the wax...I cooked a coil once, and it dripped wax onto itself, the frame, and valve cover. It was almost white.

[Seaking]

Cool, I 'guessed' that one correctly for the leads placement

Considering the rust on this project bike, it wouldn't surprise me there might be corrosion in those lead ends, but looking through the mag glass it shows bright in there..

Linked is a pic of how I have my magic box thing that makes numbers randomly show up that means something to people who know magic.. a multi-meter? Notice how I have it marked in the DCV to remind me where to set it to check battery voltages.. yeah, that's me and electricity..

Cheers and thanks!

http://www.eastcoastphotos.com/gs650g/picture0104.jpg

[BigD_83]

Crank that dial up to 200kOhm. You should be looking for around 25-30kOhm lead to lead, IIRC

[Seaking]

Ok, that's me not seeing the K in the digital copy.. groan. Thanks for pointing it out.

With the caps ON I get 33KOhm on both, with the caps off, I get 11K Ohms

The book shows doing it with the caps on (which are going to be replaced anyway) for 30-35KOhms.. so I'm guessing I have good coils.. ?

Thanks for the assist, much appreciated. Learning as I go along. Now it's time for bed.. 0300 creeping up fast.. yawn..

Cheers!

[BigD_83]

Yup, good to go.

No worries; I am quite familiar with late-night wenching sessions. Too easy to make mistakes at 3:00am.

On second thought, I think you should check your plug cap resistances individually. I think they should be 5kOhm each. You might have a developing issue there.

[Seaking]

Still not in bed yet.. erk! Sleep, where art thou?!

Not sure if "developing issue" is at hand as this project bike hasn't been fired up in two years But I'm all ears..

Can you explain what you mean by "plug cap resistances" individually? If checking the connector ends (opposite from the spark plug end) as the book describes, I think it says 3 to 5 Ohms ( got 4 Ohms) , and these check out properly.

I'll check them tomorrow with what you send me next..

Many thanks!

[tom203]

Your coil readings are normal, i.e. good. Each plug cap has resistance, stock ones maybe 10 kohms each, replacements could be 5 kohms each. Corrosion makes it hard to obtain reading, but since you got 33 kohms cap to cap, yours are OK, but new caps are about $3 each.
Like BigD83 said, maybe one of your coils overheated, but your cold coil readings are fine.

[Seaking]

I checked the caps this morning and they all show 11K Ohms, I'm guessing I'm still in the ball park with these readings? According to the book, anyway. I have access to low priced caps so it's not a big expense to replace them.

Thanks again for the assist and info, gents!

Cheers

[JSalyer]

Ohms resistance for 82 GS1100GK

I am looking to replace the original boots on my 82 GS1100GK with aftermarket, My question is there any specific brand that is prefered, and how much resistance should it be?

[Steve]

Seaking, please go back and re-read the responses to your questions.

Though I've marked each coil left and right, I have no idea to which spark plug each lead goes to.. I did notice the leads were marked 1-3 and 2-4.

Would I be correct to assume that the left coil 1-3 lead goes to cylindre 1 and the 2-4 lead goes to cylindre 2, and the right coil lead 1-3 goes to cylindre 3 and 2-4 lead to cylindre 4?

Coils 1&4 and 2&3

As for coil leads, do I understand it correctly that left hand coil lead that read 1-3 goes to cylinder 1 and the lead that reads 2-4 goes to cylinder 4?

Cool, I 'guessed' that one correctly for the leads placement

NO, you DIDN'T guess that correctly.

Look back at Chef's response.
One coil (usually the LEFT one) goes to plugs 1 and 4.
The other coil (usually the one on the RIGHT), goes to plugs 2 and 3.

.

[Seaking]

Seaking, please go back and re-read the responses to your questions.
NO, you DIDN'T guess that correctly.

Look back at Chef's response.
One coil (usually the LEFT one) goes to plugs 1 and 4.
The other coil (usually the one on the RIGHT), goes to plugs 2 and 3.

.

Nothing like getting the right answer bassackwards..