After looking for decals---seeing nothing stuck to bike----looking in shop manual you find 92 octane but on the system used in Europe---my math/memory says common used here is about 88------When I run hard/long trips I try to fuel with Super Shell....as it hurts nothing.
Around town lately I have been using 87 reg----no pinging noted, idle maybe a little ruffer than on Super, but otherwise fine.
Since fuel costs are such a little part of the cost of owning/running----think I might stick with super.
Any experiences?