Haven't had any issues on my 500. Got about 3500 miles on it in 2 years.
I haven't replaced anything dealing with the CVT belt, clutch, bearing or anything on the Axis.
I have replaced all items mentioned on a CFMoto UForce machine. No big deal. Just have to drain oil and refill. So if you do decide to change the bearing. Might as well get the stuff to do oil change as well.
The bearing, from what I can find out, is supposed to help hold the machine back or stop when letting off the gas.
I've heard the machine can be operated without the bearing. It will just not hold itself back when going down hill or letting off the gas.
Don't take this as gospel, but that's what I found out. And if the bearing is installed backwards it can make a fuss as well. Possible it was installed backwards from the factory. Don't know. Let's us know how this turns out and what you do.
Have a good one.