2000 Arctic Cat 300 running issues..Please help!! in Arctic Cat ATV Forum Posted July 1, 2011 Check those valves and let us know what you find, good luck. Okay, so I am REALLY slow with getting things done. I FINALLY got around to buying a set of feeler gauges and checked the valve lash, turns out the intake side was WAY off. This solved absolutely EVERY problem I have had with it. I also checked the exhaust side, and it seemed to smooth things out a little further, but the initial problem IS fixed. Thanks everyone!!! I could not be happier with my ride.