I have a 2002 VMAX 225 that will sometimes hesitate while running above 4,000rpm. If I vary the throttle a bit, it will stop doing this for the time being. I have changed the low pressure fuel pumps twice, (two of them were leaking each time I replaced them) but it still does this from time to time. The high pressure pump checks out o.k. according to the tests I performed with the manual. It's not a real big deal but can be annoying and I'm afraid something more serious could be causing this. I've been dealing with this same issue for three years now. The motor runs great other than the hesitation from time to time.