Grizzly Engine & Transmission 600 grizzly decompression assembly June 9, 2015 I think the noise I’m having is because the pins on the cam shaft that go in the timing cog.control the decompression pin on the top of the cam I think I have this 180 degrees out. how do I set it. Keith this one’s for you Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related