I'm not sure I understand. If the power valve actuates around 7000 rpm--which conforms to my experience--how is the hit not a function of the power valve? It seems I read elsewhere on this site that the Suzuki powervalve is different than others in that it is not a gate that essentially changes the exhaust port height, but it controls the effective "tune length" of the exhaust by opening and closing a passage to a camber in front of the engine. In other words, it relieves back pressure at high rpm. At high rpm the passage closes and the exhaust flows more easily and that is when and why you feel a hit. Isn't this why some drag racers block off the passage for a pure top end engine? Or, does the hit (due to it being "on the pipe") come 1000 rpm or so after the passage closes? I'm just seeking clarification.