I have 1500 miles on my F7 SP. I like the machine & am getting to know it pretty well. I have noticed a knock that occurs when cruising in the 5800-6200 RPM range. It seems to occur when lightly squeezing the throttle from this range. Sounds like detonation or spark knock. I have called the dealer & scheduled some of their time to look at it. Before I drop it off I am going to try higher octane fuel. I have been running 87 with a splash of iso. I recall Spaulding saying 87 should be fine. Has anyone else heard such a noise? I'll keep everyone posted.