I just learned this a day or two ago. Internet search “gas stations with 93 octane” or similar...should give you a variety of options in your area if they exist. Have your location services “OK” (on) if your using your phone and it should map up to your area.
I can speak for one CA rider (me) and others I suspect, would love to know how Stage 2 does on 91 octane with real world experience from forum members. Thanks!
2018, K1600GT, Mars Red
2015 K1600GT (sold)
2012 K1600GT (sold)