Gasoline grade poll

[Bandit1250]

I RUN NOTHING LOWER THAN 90 OR 93

Why? Do you know you're wasting your money? Not trying to be a smart ass but the Bandit was designed to run on 87 octane....anything more than that does the engine no good and in fact may cause Carbon deposits to form on the engine due to the different burn rate of a high octane fuel. (I read this in a mechanic/engineering mag I forget which one)
that and you're just making the oil companies richer.

[gyrogearcrunch]

Gas Octane? Easy. It's what it says in the user's guide and in the factory repair manual - 87 0ctane. I have a '99 Bandit 1200 and a 2007 Bandit 1255 and both seem to love the 87 octane stuff. The 1200 gets up to 46 mpg while the 1255 has given me 48.5 mpg. No sign of pinging in either one under any load/RPM combination. 

[ippo]

95 E

[asskickinpeanuts]

87 in my 2001 B1200, stage 1.

87 in my former 98 Bandit with 1218(IIRC) high compression JE pistons, head work, high performance Cam Motion cams.  And it didn't ping that I noticed, but I used 12 volt muffin fans on the oil cooler to keep the oil temperature 240 deg F or below.

[BladeRunner]

87 octane. Top tier gasoline only. Interesting thread at this link http://www.toptiergas.com/  explains how it started,the benefits, and the brands that meet the standards.