Seems to be an almost weekly question & best go by you Owners Manual. I have tried all types & octane fuels & judge them upon my feeling of power, fuel consumption, cooling of the engine, etc.
Yet in my 58 yrs of riding I have always gone back to using 87 octane for the duration of my time when riding said m/cs.
If you question what I ride, & experienc, then simply look to the left side & see that I have 3 sportbikes in my garage & in those yrs of riding above just remember I did 42 yrs of tough dirt comp which also includes 5 yrs of road racing. Besides I am an an ex-m/c mechanic ex-part-owner of two m/c shop & managed two m/c shops.
I do a LOT of hwy riding in these Cdn Rockie Mtns & YES I see the chaps with new Harleys & Cruisers lining up to fill up with the higest octane BECAUSE they are inexperinced in this world of m/cing yet I will be filling up one of my sportbikes with 87 octane.
Remember all the others on the road are crazy & out to kill you.
Last edited by Smitty; 01-17-2005 at 07:27 AM.