Clutch wobble

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Mar 6, 2007
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Here’s a wee Mpeg I took of the Commando today after putting things back together (again) The quality ain’t brilliant and it looks like a kinda strobe effect slowing things down but you can clearly see the wobble of the clutch basket.



http://s14.photobucket.com/albums/a340/ ... V05511.flv



Is this unusual?

My concern is that the primary is constantly being thrown in and out of alignment.

What d’ya think?

Norman White pronounced all the gearbox internals and clutch in good shape the other week, and I put both shafts in the lathe and they’re true. What’s causing it?

Any ideas?

Cheers

millard
 
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Millard,
Most clutch baskets wobble a bit, but that does look worse than normal. Could it be the diaphragm is buckled?
What's it like when you pull the clutch lever?


Cash
 

Ron L

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I would check the circlip on the transmission output shaft and the spacers that fit over it. Make sure the spacer is stepped side to the transmission. Next I would check the bearing in the clutch basket. If in doubt, replace it. It isn't terribly expensive.
 
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I would check the circlip on the transmission output shaft and the spacers that fit over it. Make sure the spacer is stepped side to the transmission. Next I would check the bearing in the clutch basket. If in doubt, replace it. It isn't terribly expensive.

I got the spacer the right way around but didn't do the bearing because Norman White told me that everything was OK.

millard
 
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Could it be the diaphragm is buckled?
What's it like when you pull the clutch lever?


I'll take a look at the diaphram tomorrow. Don't think disengaging the clutch makes a difference but will take a closer look, cheers
millard
 

L.A.B.

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I would also agree that the clutch bearing and circlip should be inspected/replaced. I also believe some members have said that the quoted clutch centre nut torque of 70ft lb is too much. 50ft lb being better.
 
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Interesting...I wouldn't be so concerned about the diaphram moving about. It is a bit of a loose fit anyway and it must move about somewhat depending upon the motor speed and whether the clutch lever is pulled or not. As to the basket moving...those bearings are never a tight fit. I have replaced mine a number of times over the years, and a brand new one is loose too. Put the weight of the chain together with the fact of changing the motor speed, and this setup must be whipped about and wobble a bit before it settles into running straight and appearing to be "true". All in all...seems to be normal...but admittedly unnerving to the viewer. All this motion must occur on all our machines...though we can't see it because it is happening inside the primary case...

I could be, as we all are sometimes, wrong...but looks normal to me. Check through the stuff as the others have said, and then put the cover on and go for a ride...it will all come out in the wash...:wink:
 

L.A.B.

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hewhoistoolazytologin said:
As to the basket moving...those bearings are never a tight fit. I have replaced mine a number of times over the years, and a brand new one is loose too.

The clutch bearing wasn't a standard bearing but a one dot clearance bearing (this was discussed a few months ago http://accessnorton.com/norton_commando1629.html) possibly that is the reason for the looseness of a new bearing?.
 
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Don't know...just went to thte dealer and got the bearing with the same number...am I in the wrong? Is this one you mention "tighter" than the one I have mounted? Never had any problems with mine...but live and learn... :wink:

I do...though, admittedly run my primary chain rather tight, as I just can't abide with sloppy shifting and keep the rear chain also tighter than others. Maybe a loose bearing has been an advantage with an extra tight primary chain, and it takes up the strain instead of passing it onto the bearings in the tranny....one way or the other...never a trouble so far...at well over a hundred thou but willing to listen to suggestions...
 

L.A.B.

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hewhoistoolazytologin said:
Don't know...just went to thte dealer and got the bearing with the same number...am I in the wrong?

Depends what the dealer supplied really (and also what is actually available??)

hewhoistoolazytologin said:
Is this one you mention "tighter" than the one I have mounted?

I'm not quite sure how I am supposed to know that if you are not sure which one you've got!
 
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I had a similar experience a couple of months ago.

I discovered that you can increase or decrease the wobble by turning the circlip and the spacer in relation to each other.

Couldn't completely get rid of the wobble, though.

I decided that they are probably all like this, so I just bolted it all back together and forgot about it.

Alex
 
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I decided that they are probably all like this, so I just bolted it all back together and forgot about it.


Took your advice OGB and HeWho and just shut it all up and it went fine tonight; took it to 70 and no obvious probs: so MOT tomorrow; fingers crossed:
I actually spent some time watching it running before hand and it does seem that the spring is slightly off centre and is moving more than the outer basket
thanks
millard
 
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