2000 Shifting problem under hard acceleration

[flippnswitchez]

I ride the bike pretty hard at times. I am running 16/45 on the bike, I am telling this just in case it may help on figuring out the problem. I like to launch the bike from dead stops, I don't give it any slack, I also will shift clutchless. What I have noticed that it seems like when I am hard on it shifting from 2nd to 3rd or 3rd to 4th sometimes the shifter will just start flopping and not go in to gear, I will have to shift it up again. Any idea what might cause or fix this?

 

[nicho627gb]

hi i had the same problem i adjusted the gear lever down slightley and cleaned the whole lever mecanisium and re tightened and the problem has gone away.