It doesn't look like to reap much benefit until you're up past ~5200 RPM, hp-wise. I see 5-10% increase in torque @ 3000-5000 until the big leap at about the same spot as the HP.
For everyday riding, how much more power do you "feel?" The only time I get above 5K RPM is when I really need to get on it - very rare - or on this one straight/safe stretch near my house when I'm just playing around.
From the points in your initial post, I somewhat understand the motivation behind the mods, so I'm just trying to justify this mod for my bike (vs. the big bore / freak route).
