Need help with CV Tech clutch.

I have a ’11 XMR 800 with an Airdam CV Tech clutch. Went riding the other day and after about a mile on a flat graded trail I suddenly went from tons of power to no power and not being able to get the machine above 20mph. If I got it up to about 22mph I started hearing some noise from the belt housing. I brought it to a shop and even they are stumped by it. It’s definitely something in the clutch, though. I’ve been calling Airdam but no luck on getting through yet. Anyone have some ideas?