I will try the 87 you recommend JC and see if there is any knocking. If not, Ill be more than happy to use the stuff. Last thing I want is detonation tearing my baby up! Im still kinda getting used to the bike, it loves to power wheelie in 1st & 2nd, but I absolutly love the bike! Tons more fun than my old 02 ZX7R!!! Gunna try the dragstrip soon. Any advice? Thanks!