NOMAD Tapping Noise - '02 1500

Hi, All.

I just picked up a Nomad - 2002 - low miles, warranty, etc. My first Kawasaki, I picked it over the HD Road King. I've noticed that the engine is NOISY and I can't seem to pinpoint that confounded high-speed tapping sound that happens at certain rpm's. It's not incessant, nor does it seem to affect the performance, but I'd love to know how to get rid of it.

The dealer said it was normal for Kawasaki big-V's, and not to worry about it. He also said the `1500 is a noisy engine' as a big V-twin. He also added that the windscreen exaggerates the sound by providing a sound path to the rider, and it's really not very loud (huh?) to others.

Other forums say:
1. fuel pump spring can be replaced to get rid of the sound
2. It's from the valve configuration, no remedy.
3. Heavier oil (or lighter oil) is in order, depending on who writes.

Any KAW techs on this forum? I'd love some insight on this bike's engine and how I can maximize performance while minimizing sound ugliness.

btw, I like the bike otherwise - the look is unforgettable, the styling is great, and it (so far) is very nimble for its 750-plus weight. And, when I get the Cobras and the PC installed, I expect it'll just get better.

Thanks
Brancher