So I have a 2000 zx6r and I've had it for about a month now and I love it. I just recently stubbied my exhaust and love the sound of it. I went for a ride today after not riding for a few days and my bike was running absolutely great! I than went to fill it up with gas and didn't go to my usually supplier which is BP 91 octane. Instead i filled up with kwik trips 91 and than went on a 50 mile high speed ride with my buddies, bike seemed to run good. Once i got home and on a few corners on the way home while pulling in the clutch the idle seemed to dip very low to almost 1100-1000 and seemed like it was just gunna die, but it didnt. Once i got home and listened to the bike it just didn't seem to be idling solid like usually and seemed to be idleing some what low and fluctuate a little. Also it sounded alot less loppy which isn't usual. Could this be caused from filling up with a different or a low quality of gas? It confuses me because it was running just great before.