Matching the Revs? Do you mean that I should only down shift when the revs are low enough to? I hear of people downshifting and locking up the back wheel;is this because the revs where high when they decided to downshift? I haven't put but 400 miles yet on my bike and its my first, I appreciate all the advice. I'm learning more and more everyday. I just didn't want to harm my engine by doing it the wrong way. Also, any advice on lowering the seat height? I'm only 5'6" and on my toes. Thanks
By matching revs, I'm talking about "blipping" the throttle right before downshifting. What that does is bring the revs up to what the next gear requires. You could wait and downshift when the revs are low enough, as you stated, because if the revs are still too high for the next lower gear, the rear wheel will lock. You're right about that. Blipping is a good skill to learn. It's a bit hard to explain online, but the idea is, that just prior to downshifting, you pull in the clutch, give the throttle a blip to raise the rpms, downshift, smoothly let out clutch. You do all these things almost simultaneously. When you get it right, you'll hear the rpms go up on your bike, and feel it slow just a bit, but there will be no jerk, no rear wheel lock.
If you just slam it down to the next lower gear without matching revs, it can lock the rear wheel in the worst case scenerio, or at least it'll jerk pretty badly. Just like a car if you dump the clutch too fast. The other way is, as you stated, to roll off the throttle, slowing down and letting the rpms drop, then downshifting. This works, but isn't as efficient. If you ever get into track riding, learning the blip will be a necessity.
Lower your bike? At 5'6"? I'm 5'4" and have never lowered anything. Lowering will decrease your ground clearance and can make the bike handle improperly.
First bike is a brand new 600rr? Whew, you'd have been better off with something older and used! Take it slow!