My OP, it doesn't look too bad.
Yours is quite severe though
Don't you run Meth?
Surely this would be an added benefit for high power and keeping intake clean?
How have you bypassed the breather system? Have you had issues with high crankcase pressure?
Make sure valve is closed.
Filled with carb cleaner & left it for an hour or so. Scrape as much carbon off as possible with wooden/plastic tooth pick.
Clean out the port to remove the loose carbon & carb cleaner fluid.
Blow it out with brake cleaner.
Repeat that until the port/valve are carbon free.
id say its taken about 5-6 hours on each port to get it 100% carbon free.