Ive had what I feel has been preigntion since I bought my Z. Today I confirmed that suspicion by mixing 1/2 gallon of 110 octane leaded race gas with my 93 octane fill up. After a few minutes, once the fuel had gotten through the line, the detonation noise ceased and frankly it ran better. Great, but this is a 9.8:1 engine… whats going on here? Kawasaki claims its normal, however my experiment disproves that.
Thought?
Thought?