Was at track day on Monday which was pretty warm and humid. The bike has always pulled hard all the way to redline, however this time i noticed that it had lost power after about 11.5k rpm and would not spinn up. I had to start shifting early to get the power back. It just seemed dead from about 11.5to14k rpm.
Also if cumming out of turns where the rpm's were less then 10k the bike would not pull till the rpms slowly reached over 10k. 4 gear turn exit at 9k rpm no acceleration till rpm's were over 10k, but if exited at higher speed and rpm's were over 10k it accelerated ok till 11.5 and dropped off again as described above.
Have not made any changes since last race weekend. Did switch to 100 octane gas a few weekends ago but it had been running fine.