my kawasaki keeps popping out of gear. it pops so fast that it only gives you a quick moment of wtf. it pops out and then in again. if someone was pulling the clutch in really fast and then in again fast but with out the front wheel coming off. any suggestions of what it could be? just got new oil, oil filter and transmission fluids put in. it did it before, does the same thing after. it only does it at certain rpm's. first gear doesnt do it. 2nd gear at 7,000 and at 9,000 it does it once at those rpms. when i slowly creep up to those rpms it doesnt do it. when im on a straight and open the throttle it does it. im thinking it might be clutch or the gear changer. might be that im not giving it a nice forceful puch up.