04-12-2018, 11:15 AM
Honda does not recommend high-octane in the CB1100 owners manual. Look at your plugs if you run premium in a motor that recommends low octane, they will have deposits from unburnt high-octane additives designed for high compression and hotter burning combustion. I’ve seen them on my plugs back in the day when I ran high octane because I thought if it costs more, it must be better. Trust the engineers that designed the motors requirements.
