I purchased a used 2001 zx6r... completly stock... The bike ran perfect... One day i took it on a 75 mile ride... I ran it kinda hard the entire way (about 100MPH).. When i got there the bike did have the throttle response that it used to but it ran fine... Just not as fast... only mods at the time was a k&n air filter... My dealer told me that it probably just broke in but i'm sure it wasn't that... The bike had 2500 miles on it at the time... Are you guys familiar with the air suction valve on the bike? I thought maybe that could be the problem but i can't seem to pull it out... scared of breaking it... any help is appreciated.. thanks
2001 Yellow ZX-6R
2001 Yellow ZX-6R