When I picked up my 14 MAX 800 brand new from the dealer, it was impossible to shift. They said it was normal and needed to brake in. I brought it home and removed the driven clutch.

I installed 2 of 417300265 between the driven pulley cam and driven pulley shaft. Shifts perfeclty now.
I even had the salesman drive it again, he couldnt belive it shifted so nice. I did the same to my 07 800, problem solved. That was just mine though, not saying it will fix yours or anyone elses. It would be worth a try though for $1.99. I used one shim on my 07 and 2 on my 14. .. Shorty54