Dry clutch or wet clutch G2 CSR

Information relating to the Matchless G2 or AJS Model 14 250cc Lightweight
steve bennett
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Dry clutch or wet clutch G2 CSR

Post by steve bennett »

Can anyone advise me please. I have a 1965/66 Matchless G2CSR Lightweight. I admit to limited knowledge especially in renovation butI am having problems finding out for definite whether or not I have a dry clutch, or a wet clutch on the bike. I have to say I have spoken to a couple of 'knowledgeable' bikers who also have different views on the subject leaving me confused!!!
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Biscuit
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Dry clutch or wet clutch G2 CSR

Post by Biscuit »

As the clutch runs in an oil bath, and no provision is made to stop oil reaching the clutch plus the fact that the plates are oily when inspected, I would have thought it could be termed a wet clutch.

On the other hand, you are advised to de-grease the clutch with Fullers earth if clutch slip is experienced.

Not much help is it?



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Circlip
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Dry clutch or wet clutch G2 CSR

Post by Circlip »

This is very interesting, yet Im surprised the question is even asked, how would the clutch hub bearing be lubricated if it were not wet?

If the bearing were to be replaced with a sealed for life type bearing, then I guess it could be done as the bearing only revolves when the clutch is used.
Can they be converted to dry? I dont suppose the alternator would mind? One less thing to leak!!

What is Fullers earth?Edited by - Circlip on 25 Aug 2007 03:25:56 AM
bag-o-nails
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Dry clutch or wet clutch G2 CSR

Post by bag-o-nails »

Hello circlip
the manual definitely states 586cc of oil ?
however logic says oil and clutch plates don't
mix i am not sure if we should trust the manuals on this one
it is a subject i have been meaning to raise as well ?

But this also raises Another Question the alternator fitted to my ajs 250 csr was compeletly laminated with a light green plastic
making it totaly oil resistent, the alternator has decided to retire the replacement i have
is not laminated with exposed coils
my logical thinking is,
1.will the oil interfere with the charging function of the alternator
2. does it not pose a fire risk( ark's sparks shorts)
3. is there not a risk of fire very hot clutch/then add oil= fire
4. will the oil not be picked up by the chain
and be deposited all over the rear wheel/tyre
= crash
Advice: only if you definitely know please, if we get it wrong there could be serious consequences thanks in advance
cheers b-o-n
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paul knapp
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Dry clutch or wet clutch G2 CSR

Post by paul knapp »

1. NO
2. NO
3. NO
4.
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bag-o-nails
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Dry clutch or wet clutch G2 CSR

Post by bag-o-nails »

Hello paul
if the answer to 2 is no Could you expain why
the alt i am trying to replace is laminated lucas must have done that for a reason?
what does that mean ()
bag-o-nails
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Dry clutch or wet clutch G2 CSR

Post by bag-o-nails »

hello paul
Are you down there ?
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TommoT
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Dry clutch or wet clutch G2 CSR

Post by TommoT »

Concerning the risk of fire or danger of explosions in connection with engine oil in the chaincase several factors must be looked at:

A fire needs heat, oxygen and a flammable substance to start.

The engine oil we use generally have a flash point of approx. 400 degress F.

Flash point is:
the temperature at which an oil gives off vapours that can be ignited with a flame held over the oil. The lower the flash point the greater tendency for the oil to suffer vaporization loss at high temperatures and to burn off on hot cylinder walls and pistons.

The flame in this case could be a spark from metal parts hitting eachother or electrical sparks.

Since the generator works on the induction principle, creating current in its windings and sending it through wires to the electrical system should not create any sparks.

As for metal sparks fly around, even in the rare cases this happens, the temperature inside the chaincase would be nowhere near the flash point of engine oil, so no problem here either.

In short, a fire in the chaincase due to a faulty generator or other mechanical disasters are highly unlikely.

When did you last hear one of your mates experience a chaincase fire? No I didn't think so Edited by - TommoT on 25 Aug 2007 11:03:27 AM
TommoT

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SPRIDDLER
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Dry clutch or wet clutch G2 CSR

Post by SPRIDDLER »

Blimey, bag-o-nerves!

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Which taken at the flood............'
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Biscuit
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Dry clutch or wet clutch G2 CSR

Post by Biscuit »

Fullers earth - Google for it.



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