you cant adjust them unless you have fitted solid ones, which im guessing you havent done, give them a chance, they need to fill with oil, but should quite down after a few mins, well within 30 seconds really.
in saying that i had something like it once and undone and re tightened the rocker ams and it stopsed, but remember the rockes do wear a little so this might be the cause, but never expect a cvh head to be noise free