Clutch nut spinning won't come off.

[xsel777]

My xciting 500 RI is in the shop for a head gasket.
But the lady who answered the phone there when I called to check on progress said the mechanic said the clutch nut is spinning and won't come off.
I have the assembly and disassembly totally sorted  and can do it in 10 min or less now, and I recently looked in the cvt and all was good.
One thing I can mention  is that there has been this loud chatter/rattle at very low speeds just above idle (when the engine is not too loud.) coming from the rear 
I thought it was the springs on the  brakes, that hold the pads in place, as I changed the pads.

Since the mechanic is indicating an issue in cvt, here is a possibility.
About a year ago i went to an engineering company to help me change out the clutch spring, there is a very very big nut holding the whole assembly together. If that came loose a bit, would the clutch still work, but the outer nut would spin(maybe the whole shaft is moving with the tight nut.)

What are your thoughts on this strange situation?

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[de dee]

My xciting 500 RI is in the shop for a head gasket.
But the lady who answered the phone there when I called to check on progress said the mechanic said the clutch nut is spinning and won't come off.
I have the assembly and disassembly totally sorted  and can do it in 10 min or less now, and I recently looked in the cvt and all was good.
One thing I can mention  is that there has been this loud chatter/rattle at very low speeds just above idle (when the engine is not too loud.) coming from the rear 
I thought it was the springs on the  brakes, that hold the pads in place, as I changed the pads.

Since the mechanic is indicating an issue in cvt, here is a possibility.
About a year ago i went to an engineering company to help me change out the clutch spring, there is a very very big nut holding the whole assembly together. If that came loose a bit, would the clutch still work, but the outer nut would spin(maybe the whole shaft is moving with the tight nut.)

What are your thoughts on this strange situation?

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  is it the nut that holds the clutch on the shaft,  or is it the big nut that holds the clutch together  if it is the small nut it is striped and it needs to be cut off,. if the shaft is striped you may need a new shaft, or re-thread it with a new nut

[xsel777]

Update. It was the clutch shaft, thread stripped. It must be replaced. I got caught by a mobile thread company. I thought a heli coil could go on there, but they just cleaned it up, and said a heli coil is for a hole not a shaft. They only told me this after i complained about the dodgy job. But they took my money i left at the workshop, no problem with that... Anyways, live and learn hey?

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[Stig / Major Tom]

Update. It was the clutch shaft, thread stripped. It must be replaced. I got caught by a mobile thread company. I thought a heli coil could go on there, but they just cleaned it up, and said a heli coil is for a hole not a shaft. They only told me this after i complained about the dodgy job. But they took my money i left at the workshop, no problem with that... Anyways, live and learn hey?

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Thread is stripped?
Was nut overtightened, or ?
What might have caused this?
Sorry for your troubles.
Stig

[xsel777]

Yep, the thread is stripped. I don't understand, as i believe the nut Is supposed  to be of softer material. I used to add an extra 10 nm using torque wrench, because i did not trust my low end wrench as i bought it used. Luckily  the shop has a used shaft, so that is a saving.

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