heyyy guys! ok, I previously owned an 08 zx6 that we put pp 2cts on... at low speeds it had an annoying wobble, but I topped it out many times and it was smooth at the top speeds... now I have an 07 zx6 with 6000 miles, on the stock tires it felt great; just installed a new front PP2ct and now I am having a violent headshake starting at about 120... I mean almost to the point of tank slapping (if I were to keep pushing it)... both my 08 and this one had dyna beads in the tires (which we have used on about 10 sportbikes, and they have been great from 0-top speeds every time)... so in short, what do you think could be causing this? we have checked the air pressure, tightened the steering stem... ect... but it is truly baffling!! any advice welcome and thanks so much!!