[Tim Brewer]

If your engine ran well befor, and after the valves were adjusted it doesn't run so well now, well there you go. Your valves arn't adjusted correctly. You arn't going to get more cam by adjusting your valves, your cam is what it is. Also, after adjusting your valves, you will never need to adjust timing or rejet your carb or do anything. But, we would need to know what type of cam and lifter setup you have in order to help you more. There are two types, solid and roller. Solid will require lash(gap) and roller has none.
Tim