I adjusted the valves for the first time on my 420 rancher. Before i adjusted them i checked them. Intake was at .007 inch. And exhaust was at less that .006 could not fit my gauge for the intake aide under it. So i readjusted them. And after i put it all back together. Thing runs perfect. But at a dead idle i can hear a faint tick. Not a knock. Just a tick. Is this normal.