hi. i ride a new kwaka zx6r. the last 2 days something wierd has been happening that i havent experienced before. the problem is that after medium to full acceleration rate i change up to 4th gear reaching approx 80- 90kmph. i then took both hands off the bars, and therefore the throttle and leaned back and stretched. (i was tired and the lights were going red) however upon sudden releasing of the throttle the bike will slow down, obviously, however the handlebars start to perform a tank slapper. the bike holds it self, and i start to grab the bars again, to stop the tank slapper and let the bike slow down. it doesnt really happen at lower gears and lower speeds around 50-60kmph and it doesnt really happen at higher speeds such as 100 - 140kmph. i repeated the method though, just to see if it was right. at first i thought that it was 1. bumpy road 2. leaning bike 3. my imagination. however, i dont think it is. do i have a bent wheel? or is my front wheel out of alignment. can it be? or is this just a natural phenonmena of physics with engine compression braking and forces being applied to the front wheel under deacceletartion. the reason im concerned is that i havent really changed my riding style, im sure ive done this before and not had the reaction, but im also sure that i have not hit anything that may have mechanincal cause this does anyone have anyone experience?