Originally Posted by v8toilet
If the clutch jet on your bike has been modified or replaced with one with a larger orifice it will also contribute to more drag.
If you're having trouble hitting neutral when hot or if you have a bit of drag in your clutch you can blip the throttle while attempting neutral from a stand still, or make sure you hit it while you're in motion. These are workarounds and not the solution you are looking for.
This is EXACTLY what a larger clutch oil jet will do. In my personal experience, the popular .50 size jet causes so much clutch drag when warm that it's ridiculous. The condition of the clutch hydraulic fluid is unlikely to be the culprit in this case.