All 600's have low torque at lower RPM's. Nothing such as getting the newest or oldest model will make a difference. Brakes are the same for all years of R6. It would be hard to notice a difference on the street or at the track. Between 99 and 05 the R6 lost maybe 10 lbs, which isn't that noticable. Im unsure of HP, but 99 to 05 problably only gained 5 HP. I have heard that the most noticable difference between 99 and 05 is handling, though, Ive always thought the 99 was the best on the track. 05's are suppose to be better. I 've never been on an 05.
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