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I haven't seen those style/brand plugs for a while, (mine were Bosch). I believe I have a set just like it sitting in my parts box. I tried them, as with you, I was following the manual's recommendation. But I then switched to the Autolite plugs that everyone here said worked better. And they seem to. Sorry I can't remember the plug number but someone will add that to this thread. It's the surging that the Autolites do better with. I'm sure the Bosch ignite the fuel just fine.
I've disliked Bosch plugs for a looooong time.... NGK and Autolite always seemed to help the bike run better...
Considering the overall lighting of the photo, yours don't look too bad; if you stick with NGKs, maybe one range hotter? But do an all-around overall tuneup first (valves, throttle body sync, air filter).
Autolites for the 1100 is AP3923; available at any auto parts store (or they'll have 'em for you in 2 days) and they're a bunch cheaper than Bosch. Gap is 0.031"; Always check before installing them, and if they need to be reset, be VERY careful that you don't chip or otherwise damage the center electrode in the process.
Your old spark plugs look fine to me. I actually put NGK in just about all of my engines, be it car, boat, lawn mower, etc. However, I switched to Autolite for my 97 RT, about 30k miles ago and never looked back. Starts and runs smooth as ever.