When your motorcycle calls for 89 octane and you run 87 what are the problems with that? During the winter I put fuel stabilizer in my gas and that kills the octane so in the spring when I run the engine for the first tank octane is probably at a very minimum.

In a car the computer system adjusts itself to the octane level so you do not have the ping sound you had in an engine of the 1970's.

Does the computer system in the bike adjust for the octane we have in the gas in our bike tanks?