I have started experienced the bike bogging down under heavy load, this seemed to have started after the major service. I suspect the issue was always there, it has just become a lot more noticeable as I have become more comfortable with the bike.
Things I have noted that seem to bring on the issue:
Throttle more than 75%.
RPM higher than 6000.
The issue seems to get worse the longer the session.
There is no FI light
I have included a video of this happening, to help explain my issue.
It essentially feels like hitting limiter, however the power can come back on immediately after, which is all sorts of unsettling.
Turning the bike off for a few minutes seems to improve the issue for a minute or so.
About the bike:
2009 GSX-R 1000
I bought the bike used at 42,000 km with all the modifications.
Currently has 51,500 km's or 32,000 in freedom units
PCV with questionable install (wiring is awful)
Yoshimura R77 Exhaust
K&N air filter
Some things I have tried:
Fuel tank breather hose did appear to be pinched. I stopped it from being pinched, perhaps it's damaged though?
I tried a different fuel map on the PCV but it just seems to change where bogging begins, either higher up in the RPM or lower.
It had the major service so, new spark plugs and the air filter was cleaned.