After having issues with the touchy throttle on my 2021 Uforce 1000, I tried the MSC clutch kit and ECU flash.  It was marginally better but not smooth like other manufacturers models that my friends have.  The dealership was not helpful. 
I contacted CFMOTO customer service through their website about a month ago and have heard crickets.  Not so much as Hey we got your message and will get back with you.  And you know that they know there is a problem because they have supposedly fixed the issue in the newer year models.
Before this, I was actually considering buying one of their motorcycles also but now I've sold my Uforce and will look elsewhere if I buy another UTV.  If they don't stand behind it with customer service then I won't buy their products.

After installing a clutch kit and ECU flash you probably voided your warranty. So I wouldn't expect much help from Cfmoto now.

[2015 Z Force 800 53/Trail EPS]

CFM's been slack'n a bit lately on customer service. Use to they bent-over backwards to make someone happy...even covered stuff even when it was out of warranty but that's not the case these days. And yeah they look for reasons to void warranties now.

My warranty was already expired.  That doesn't excuse them from replying to a customer.
The dealership told me that CFMOTO wouldn't give them any guidance on the throttle issue either and that it was a common problem.  They were having other warranty issues with them as well. 
Too bad for the brand.  With proper customer support, they could dominate the market because of the bang for the buck.  Every brand and model has some issue but it's how the company handles that issue that sticks in the minds of the consumers.
Y'all have fun and be safe.  I'm out.  Sold mine and done with CFMOTO.  Already bought another popular and highly rated brand.  Time will tell as to any issues but friends and reports indicate the company takes care of them.