Clutch troubles

Hi, a few months ago I bought a 2005 Grizzly 660 with 3200 km. I noticed a clicking sound when decelerating but everything was working good. Last ride we went down a big hill and then stopped at the bottom and shut it off for a bit. When I started it again the clutch won’t release. To get it moving I had to give it some throttle while in neutral and then jam it into high. If you come to a stop it stalls. When I got it home I pulled the cover and checked the primary and secondary clutches. Both seem to be fine. I did some research and came to the conclusion that it must be the one way bearing. I ordered one and attempted to change it today. Unfortunately, I can’t t get the cover off to get in there. I got as far as is shown in the picture but can’t get any further. How can I get this off?
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