I have a 2000 Honda CBR 600 F4 black and yellow, the bike is completely stock. Its my first bike, i bought a week ago with 6200 miles on it. I want to know what the recmended octane rating is in the owners manual (mine did´nt come with one). I have been using premium 91, but yesterday i accidentaly put 87 octane in it, Is the 87 ok this time? should i drain it? Also how can i get a owners manual?