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Here is a post I made about the cfmoto over on their forum. Can see what could happen if the cvt belt gets wrapped around the sheaves https://cfmoto-forum.com/uforce-600/2013-uforce-transmission-locked-up/

Clean the sheaves with soap and water. Then lightly scuff the sides with a brillo pad. Watch a few YouTube videos on replacing the cvt belt. Doesn't have to be same model or same machine. You are just wanting a general look at how to clean up the sheaves. Replaced the clutch 2 times on a cfmoto 600 uforce. Once just ofter I purchased the used machine. Then 8 months later after a catastrophic cvt belt failure flipped me and the wife on its side do8ng about 30mph down the highway. The belt came apart in pieces and chunks and wrapped around the sheaves. Locking the transmission/rear wheels. Then we went sliding down the blacktop. I turned the steering wheel to ease off the highway onto a grass area. Then we flipped on the driver side. Just some bruises and a few scratches. Nothing serious. After getting machine back on its wheels was able to put in neutral and push around. Then called brother-in-law to bring a trailer and load. Repaired the machine and sold at wife's request. Then got a Axis 500. Same cvt belt setup. But in her mind it hadn't tried to kill us. Lol Look at a diy tool for the secondary sheave for a cfmoto. There's a lot of guys that a tool for adjusting the clocking to remove the HD spring. I'm not familiar with your setup. But most are similar. There is a lot of force under that spring. Becareful that spring can seriously hurt or kill you. Also when I got the new Axis I put on a 5-point harness simply because the cfmoto flipped us and the lap belt wasn't enough to keep the wife from getting hurt.