The stopper bolt would not lock the rear wheel. The clutch is between the CVT and the rear wheel.Maybe the stopper bolt drop out or sheared off. Check other posts, do a search on "stopper Bolt".
Maybe the belt snapped?
This would be true. If the belt snapped then the wheel will not turn when the engine is rev'ed but you could spin it by hand.But can you turn the wheel by hand????????
Exactly. Buying a used CVT is borrowing time on an unknown unit. It would upset ME if I sold an used CVT only to have it fail on the buyer in less than a years time. Like Buffalo said, getting the engine module, the whole engine to rear tire is basicly 1 unit, down enough to pull the CVT is about the hardest part. Split the CVT case and replacing a belt and maybe a bearing or two is easy for some of us.If you can do the work yourself and the only problem is a broken belt then I would not even consider buying a used CVT. I would just replace the belt. Once you get the CVT out of the bike splitting the case and replacing the belt is not a big deal.
....if it's not the caliper, then remove the rear wheel and see if the drive train is moving. If not, report back here.Then your problem is not a broken belt. Something downstream from the clutch is locked up. Start at the rear caliper and work forward through drive train until you determine what is locked up.
Simple way to eliminate the caliper is to just remove the two bolts that hold it on then pull it off. If the wheel will then turn your problem is in the rear brake caliper.