Thanks for the follow up.
In case it's helpful, below is a quick copy & paste of my notes on the belt change (I am OCD enough to keep notes on all maintenance). Very straightforward, simple job. Except that Mr. Brainiac -- this would be me -- forgot I left the variator holder in place when I started the bike to test the new belt. I heard one "clunk" and everything stopped. Took me a long minute to figure out the problem.
CVT BELT
Installed new Mitsuboshi belt March 2021 with Dr. Pulley 28-gram sliders. NOTES: Pretty simple, easy process. Couple tips: for the bolt on the metal CVT case you have to reach through the drilled hole, take that out last and put it in first so you have wiggle room to help it in and out of the drill hole. A #30 t-handle torx screwdriver is perfect for this. 17mm nut on the clutch (left) turns CLOCKWISE to loosen and reverse that to tighten. Torque for both is 100 Nm or 74 ft. lbs. Old belt had cracks in the ridges all the way around the inside of the belt. Definitely showing its age at 15,100 miles. Made sure arrows on belt pointed in the same direction the belt moves. Made sure I bent down the metal tabs behind the 33mm nuts.
BMW variator holder # 83302414987
BMW CVT grease # 83192160349
Drive belt every 12,000 miles
CVT BELT:
BMW Part #: 24827729767, $388.64
MITSUBOSHI 2777001 (same belt, MUCH cheaper in Europe, 76 Euros)
Belt height: 16.9mm, Belt angle 28°, Belt length 894mm, Belt width 32.4mm.
Mitsuboshi belt:
https://www.carpimoto.it/en-US/Exha...67-Mitsuboshi-Transmission-Belt-BMW-C600-.htm