2021 cfmoto 950 (locked up rear diff cause) for me.

Rear diff locked up and not because of loose ring gear bolts, they were checked and red lock tightened. Driving along at around 30mph and back end locked up. Less then 800 miles and never showed a sign anything was wrong until it happens.
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[@dustindouglas4255]

Mine did the same exact thing on the uforce1000