If you are a heavier rider you can gain a small/modest amount more by going to a stiffer front spring matched to your weight.
Check your have the preload adjusted correctly for your weight on the GSXR shock. Might be sagging more than needed.
Consider that the chicken strip width depends on tire pressure. Many of us run less than the factory rear pressure which is for full load.
I believe the max lean topic has come up in other threads - you can check.
2014 CB500F: GSXR600 rear shock, Traxxion fork emulators+springs, Kuryakyn Throttle Boss, IDEA Gear Indicator, Slipstreamer S-06 windscreen, SW-Motech handlebar risers, LED tail light, rubber tank side pads.