Motorcycle Repair: unusual noise and vibration, kawasaki ninja zx, wheel alignment

Question
I own a 03 Kawasaki Ninja ZX-636.  I laid it down about a month ago and took it to the shop because it kept resetting itself when I placed the ignition switch in the ON position.  They found that the problem was due to a stuck solenoid.  However, now when I am riding and get to 6500 to 7500 rpm (in every gear), it makes a loud vibration noise.  If I speed up, the noise will lower, when I slow back down, it gets loud at that range again.  It only makes the noise when I am riding.  If I lift the bike and just accelerate to 6500-7500 range, it won't make the noise.  Are you familiar with this kind of problem?

Answer
Hi Serg,

Trying to reproduce vibrations or sounds by raising the vehicle is not a true and accurte representaion of the problem.

For example, the problem may be within the front wheel. Is the front wheel rotating at speed in the test?

Vibrations can cause noises and sensations from a variety of sources. These sources are often generated by rotaing parts or are directly related to rotating parts.

Knowing the series of events of the crash would help a tech investigate what is causing the problem.
It may be fairing parts vibrating at specific frequencies. Try loosening all fairing fasteners and realinging the fairing parts to find their 'homes' again.

It may be tweaked triple tree. Try loosenening the forks and retorquing.

Check wheel alignment, tire wear, and frame alignment. Cupped tire patterns play havoc of straight line traction. Minute frame alignment and wheel alignment may cause vibrations.

If I could study the Ninja, I could provide more accurate presentation.

Respectfully,
Mark Shively