Reed on Europe burg site, 2010 - 2011 - 2012 650 Burgie have rarely CVT problem since change to CVT by longer bolt and primary pullie housing more deep for receive bolt, also Suzuki make again changes on 2013 model to make CVT again better stronger.
They confirm Europe dealer network receive instruction letter from Suzuki to change CVT bolt on regular basis plus torque such bolt often as some bolt get loose and this factor for CVT break.
It consider part of Suzuki maintenance program now for change bolt minimum 12,000-15,000 kms approx. and torque again a few time to make sure not loose or slip back off torque.
7000-9500 mile approx. @ 26 ft-lbs
We now to verify torque on burgies now every 2500-3000 kms, if prefer 1500-2000 mile, it only take 2 minute to do.