Re: Read my spark plug?
You need a fresh plug. While that one still works, and may eventually clear more of that carbon - it will make seeing small changes much harder.
Install a new plug & ride it a few minutes to warm up. make a WOT pull then pull the clutch in & kill the engine. When it cools down pull the plug & check it.
It can take hundreds of miles to clear out carbon on an insulator like the plug in your picture. Once you get what you want from the new plug, put that blackened one back in & ride the heck out of it.