Do I trust this forum or the manual?

[Graydog]

Ok, I have read all the post about low octane VS high octane gas. Seems most agree that Reg. 87 octane works fine. BUT...the shop where I bought it filled it with 93 octane when I left. The manual says no less than 91 octane. I ran several tanks of 93 with no problem. The last tank I put 87 in it. (There was about 1/2 gal of 93 left in it.) Now I notice the bike misses sometimes if I am going over 55 to 60. Not bad....but noticeable and not every time.

Any suggestions as to what to look for if it is not the octane? Did fine with 93 in it. Over 200 miles with no miss. Today, after the tank was half empty, I put 93 in it. Took it out to highway and could not get it to miss.

The bike is an 07 with 1400 miles on it.

Thanks for your help.