I was on the track recently (I have motoGP shift on my F3), during the first few laps I was upshifting no problem (clutchless)
However, as the day went on, it became harder to clutchless upshift. I got locked out of 6th. Then later in the day I got locked out of 4th. It upshifted fine when I used the clutch, but it slowed me down a lot. Note that during the beginning of the day I had no issues. problem started when the day went on.

My other problem is I had trouble getting it into neutral as the day went on. At the beginning of the day, this was not an issue either.

Thanks for any feedback

ps: Just an FYI that I always use the clutch for downshifting, just not for upshifting for obvious reasons. Also, the bike has been a track queen it's whole life. It has only 5k on it. I bought it used

 

sounds like something's ready to come loose.. Short of splitting the case, you really can't see what's going on in there. Metal in oil? low on oil? i got nothing..