I've googled and googled, but for the life of me I cannot find out what fuel to put in my 2000 Kawasaki ZZR-250. I'm guessing just 91 octane is fine, is their any advantage to putting the better stuff in? Is 91 fine? Thanks Also, if anyone has or knows where I can find an owners manual for the bike, or where I can download one, it would be great. Cheers.