Originally Posted by TommyHolly
I'm asking because the ICE-Air was able to change the mixture enough that the guy with the fuel chart was able to run 87 octane? He never mentioned what year his bike was in the test. I'm not sure if older versions used 87 in the past?
I don't know of any BMWs that were spec'd to run on 87. Maybe some of the detuned low compression airheads, but my '77 R100RS needed to be dual plugged to run on 91.
My 1999 1150GS would ping on 91.