I personally noticed that my bike seemed to lose a little
performance running on 93. I was running it because here in
SW PA we get oxygenated fuel for emisions from June 15 till
Sept 15. Some of the power equiptment I have worked with
advices using the next higher octane of oxygenated fuel so I
figured I would do this with the bike also. When I was out
last year I went back to the 89 and noticed the bike ran
better. I then thought back to my racing days and remembered
that we decreased octane until we had a problem and then
went back up. We ran cars on pump gas through 130 octane
AVgas. You can see 1/4 mile times change when you need more
octane but once you had enough octane more wasn't going
to make you any faster. More octane won't give you better
performance unless the engine needs it.
