I have a 2009 grizzly 550 and i know that clicking is most likely cv but i have replaced both my axels , changed gear oil , checked for anything loose on the frame and im still getting the clicking noise ive asked so many people and no one seems to know. its more of an annoyance but i would like to fix it because it definitely does not sound good. i cant really hear it if im out riding but when going slow you can hear it very loud.