Did Ron mention anything about changing the plugs temp rating ie hotter/colder plugs?

If nothing else at least you might get some nice lookin flamage out the pipe on the downshifts with 93.

Its hard to say just by looking at the plug how lean it is but most of the modern sportbikes run very high compression ratios and lean mixtures to make power. basically a balance between detonating and running clean. Using a higher octane is only going to safeguard the motor from detonation or extreme cylinder temps.
I would definitely check your A/F a motor can run on the verge of breakdown for a while before it shows its signs of wear and tear.
Just because it sounds good runs good feels good doesnt mean it s good.

I run 87 octane all the time in my 99 R6, even raced with it in the tank. I can even run with Ralph on his R1 at any track.

Bastard!!!

That R1 is a real handfull.:drink:

Thats all you wanted to say, right Geo?