read the link i sent you - its a step by step detailed write up of how to do valves on a husky 610.... and ive never seen one that you adjust between cam and arm, but i have only messed with a couple, so who knows this is how ive always seen it done... locking nut on arm, undo it, adjust arm down to spec, tighten locking nut, double check measurement and according to the link i posted, this is the proper way to do it on a husky 610