Thinking about a wider rear tire

[ingobohn_imp]

You could also consider the classic BT 45 as it is available in the right dimensions. It is however NOT recommended by Bridgestone, so you'd run on your own risk.

The BT45 is a bias ply tire which is (I asked Bridgestone and got it as reply) totally NOT recommended for use on the CB 1100.
Meanwhile my dealer mounted Pirelli Sport Demons on my CB 1100 (both tires had enough profile left for another 6.000 km, but the front tire showed an extreme and unacceptable sawtooth pattern.

My first impressions after 600 km:
(+) The tires get faster and slightly higher warmed up which helps having a good grip.
(+) The tire falls much easier into the curve than my Dunlops. In the beginning it was a bit surprising, now I am used to it. They are more agile.
(+) Nonetheless, running straight forward (even with higher speed) is still stable.
(+) Correcting the drive line in curves needs a bit more "hands on" compared to my Dunnies.
(o) The profile design looks even a bit too modern for a classic bike like the CB 1100.
(o) No difference in grip compared to the Dunlops on dry road. (Wet roads not tested so far.)
(-) The Pirellis are a bit harder (or have stiffer flanks) so they are a bit less comfortable than my Dunnies. Maybe I will reduce tire pressure by 0,1 or 0,2 bar.
(-) The tires follow a bit more road ruts or markings.

After now approx. 1000 km with the Sport Demon, I still did not completely get used to this very agile way of falling into the curves. I played around a bit with different tire pressures (lower/higher) but this did not work out.

What I did: I changed the pre-load of the rear suspension 1 setting softer (now on "2", before it was on "3"). The factory setup is "2" but I changed it after the run-in period to "3" because the whole bike was a bit more precise in handling then. The higher pre-load put more pressure on the front fork/wheel which helped a bit. But it seems that the Pirelli Sport Demon do not like this higher pressure. After setting it to "2" and doing a test ride, I was completely surprised how much better it is now. I did not expect that this would really have such a significant impact...