I just purchased my zx9r, 1998 model, and I found that the 3rd and 4th input and output gears were stripped so I purchased a used set of cluster gears and swapped them out. After shortening the shaft to fit the clutch release mechanism and installing the clutches I can not shift gears. The shifter moves freely but acts as if it is stuck between gears. I did not remove any shift linkage from the case and did not remove the shift tube that controls the shift forks. I am lost for causes. Thanks for any ideas on what my new problem may be.