Just purchased a Kawasaki Ninja 250R. $5k with all the "other stuff" since this is my first one, including helmet (Scorpion EXO 1000), overpants (bug splats on work clothes is not cool), gloves, etc. Went in and took my permit test Wed. morning, and passed on 1st try with an 88%. I got nervous when some guys that were in front of me were told they missed 8 and 11 . I was relieved to hear I'd only missed three. Whew! So anyway, that afternoon, went and picked up a brand new Diablo Black Ninja for $3850! Yea yea, the LITTLE one. I figure with 60+mpg, it'll be a great starter bike for me, and I can sell it and pick up a bigger one next year. I'm trying to break this bike in "nice", but good God, the revs are high at highway speed (manual says keep it under 4k at first, then under 6k for a while). Does anyone else here have a 250, 500, or 650? They're all fairly similar, and I'd like to know if anyone has swapped out the rear sprocket for a smaller (taller gear ratio) one for lower RPMs at highway speed. I'll be using the bike for commuting, not pretending I have a race bike, so I'm interested in all the MPGs I can squeeze out of it. So far, I love the new bike, and despite the fact that it'd been about 10 years since I'd been on one, I picked it right up.