learned this trick off you tube, I use it on my Skidoo Engine but it will also work on a pilot or oddy.
only need teflon tape and water.
you also need a bolt with the thread that in in the primary clutch, the skidoo uses the same thread as in the crank.
wrap the bolt threads with plenty of tape, it must provide a tight seal. tip your machine on it's side, I.e heard that 15 or 20 degrees is all it takes, I have always put it on it's side, with the bolt out, fill with water, thread your bolt into the primary clutch, as you tighten the pressure builds and will pop the clutch right off, if you have a good seal it will work just using a wrench, many use an impact on it.
check it out on you tube just search "how to remove cvt water" or "cvt water trick" there are many.
wondering how many others have used this method?

You can take it one step further if that don’t work by following the directions above but instead of tightening the bolt let ur vehicle sit outside when there is a hard freeze and the water freezing will pop the clutch right off. Was the only way mine was coming off and lucky for me we got a hard freeze once that year just when I needed it.

The tape worries me, if you use too much you could damage the threads. I haven't tried it myself, but I've heard of people using grease with no teflon tape.

Or, use grease and don't tip your car over?

I've not heard of Teflon tape damaging threads, if you are talking about pipe threads then you can tighten too tight and do some damage especially if into a casting.

Water is a much easier clean up

If you're only a few threads in and you have too much tape you can damage the first few threads.

I have done this with both water and grease, and both worked, water was much easier to clean up lol

But the threads won't rust!