Hi Guys,
When the engine is not running I have all the gears and no false neutrals. When I fire the bike up pull the clutch you can feel the bike going in to gear (though this is very light no clunking, which I get when selecting 1st gear on my T140). When you release the clutch the bike goes nowhere, as if it is not in gear, switch the bike off and it is.
If I try straight after starting from cold it works as I have ridden the bike up and down the road. From hot and I put the bike in neutral I get the problem I have mentioned above. I have installed a primary belt drive and am running the primary dry.
The clutch cable is not to tight as I have checked the clutch activating system in the gearbox and it seem to be pulling and releasing fully, also checked the clutch diaphragm and again it seems to be releasing completely.
Any ideas?
It sounds horribly as if t…
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With the primary cover off…
With the primary cover off can you see the pressure plate moving in out and in as you pull and release then clutch lever?
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Thanks for that though I c…
Thanks for that though I can not see that it is the front pulley, becauseI did ride it up the road first thing this morning. I am not a small chap and if the front pulley was spinning, I'm sure I would not have got off the drive.
"If not, then a major clutch stack-height error meaning that the diaphragm spring is exerting no pressure."
How would I go about checking to see if this is the problem?
I did not mention it is a MK3
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Yes I can see it move and…
Yes I can see it move and feel it when pulling the clutch lever
I can also check that the clutch is working by putting bike on the centre stand put it in gear pull the cluch and turn the back wheel
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My thinking was that if th…
My thinking was that if the front pulley is alloy then it could expand as it got hot and then begin to spin.
If the Commando clutch has too many (or too thick) plates then it will be just before the point where it goes over-centre and you'll have little clamping pressure (a lovely light lever action though).
Did this happen as soon as you installed the belt or has it suddenly occurred with a bike that was previously OK ?
It's more of a fiddle on the Mk3 but I'd put it in gear (second maybe), remove the cover and run it to see what is turning and what isn't.
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the clutch does have a ver…
the clutch does have a very light lever, not sure what it was like before as the bike was a rusty rat when I got it and have just finished restoring the bike.
I will try tomorrow what you have surgested
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Does it start with the sta…
Does it start with the starter or kickstart - the drive to the crank is different for each method if my memory serves me correctly - this would dispel or confirm primary drive pulley. Also ensure that the push rod operating cup and ball are correctly located inside the outer cover on the right hand side.
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Further to my last, It may…
Further to my last, It may even be something as simple as there being no push rod play. this may account for the difference when cold and hot. This would also make the clutch action light.
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Thanks for all your replie…
Thanks for all your replies, I have worked it out I have clutch slip. It was recommended I rough all the plates up, this I have done. I had a electrical problem which I have sorted so will put the bike back together and hope I have sorted the problem.
Again thanks to everyone for the support
If I have not fixed the clutch slip I will start another thread
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It sounds horribly as if the front pulley is spinning on the crank. Is it pulled hard onto the taper with key in place ? If not, then a major clutch stack-height error meaning that the diaphragm spring is exerting no pressure.