I just recently purchased 2002 Zx9r with 9500 miles. Immediately after purchasing the bike, the transmission started making a whining noise. After about 200 miles, the noise got so bad that I decided to take the motor apart. Besides some bluing of the gears, I really couldn't find anything the matter with it. I went ahead and rebuilt transmission and put bearings in the motor while I was at it. I also change the two oil lines in the bottom and side of the case. After putting it all back together and trying it, it's starting to make noise again. Does anybody have any ideas?