Doesn't look that bad to me but pic's can be deceving.
Post pi'cs of your plugs.
And describe any troubleshooting you have done
Oh, my plugs are very sooty, nice dry black soot! Actually, there's a bit of nice brown color, but not that much.
To be honest, I've played around with so many things that my head hurts. I had the carbs out and checked over by an experienced classic bike builder. That was a few months ago. Recently, the bike has been running mostly fine although I always sensed a smell of fuel every time I started her up and struggled to get past 70mph. At that speed, the remaining play in the throttle wouldn't produce any more power. I've swapped plugs twice, fiddled around with the fuel screws, checked the carb floats (one of the needles was a bit sticky), changed plug caps, checked the valves and timing, checked the clutch plates, changed the oil and cleaned the centrifugal filter. I haven't done a compression test yet and I have a spare coil and condenser which I'm thinking of trying out. Obviously, I've had a look at the air filter elements and I've got a good battery.
Sadly, this is not a very methodical approach but I just do what I can when the weather permits. I am really quite an amateur at this kind of stuff and whilst the bike obviously has some sort of fueling issue I can still get out for rides, and I'm learning quite a bit about basic mechanics, even if I haven't succeeded just yet.
To paraphrase the above, it feels like there's too much fuel going through the carbs. The bike ticks over too easily from cold (although I do need the choke to start it) and it just smells rich. I guess that I should start from scratch, hence my post about the color of the filters. Hopefully I can cross that one off the list.