I’m helping a buddy with a 2020 renegade adrenaline 850. He wanted to changed the chain case oil. I put an Allen wrench on it and before I loosened it noticed a bit of oil on it. We were confused so we got it on a lift and in the mean time most of the oil leaked out. I thought the plug was missing. It was in there though. We took the front cover off….ended up getting the plug out and the plug looks fine. It looks like a tiny crack in the chain case down in the threads but it’s really hard to see. We are still confused how or why the oil came out with the plug in. What does it take to get the back cover off? Looks like 3 or 4 fancy Rivets of some sort? Any suggestions? I got the plug back in and it’s not leaking the tiny bit of water down in the drain hole. I would feel better getting the back cover off and looking at the bottom good though I think.