I have the same issue. My CVT rings, but only in the morning when it's cold. If it's warm in the afternoon, there's no ringing.
I also experienced high RPM to engage the clutch (5000 RPM before it'd start engaging), so I 'de-glazed' the clutch (held the rear brake, revved it up to maximum throttle, held it for 15 seconds, throttled down and let it cool down for 15 minutes, then repeated). After doing that, the clutch starts grabbing at about 3500 RPM, and is fully engaged at about 4000 RPM. And when it grabs, it *really* grabs, if I'm slowing down for a red light (almost at a stop, but still rolling about 5 MPH, clutch disengaged), and the light changes, and I throttle back up, it'll almost lift the front wheel off the ground if I goose it too much.
I'm hoping to install an aftermarket clutch when I hit around 6000 miles, if I can find one that'll fit the Yager. Anyone know of a good one that'll work with this scooter? I want to set it up so it starts engaging at about 3000 RPM, and is fully engaged at around 3750 or so... it'll help with the low-speed riding I sometimes have to do in heavy traffic (really heavy traffic, too packed to even thread the needle).