Welcome to the forum....
I've been ridding Sportsters for years and always used ethanol free 91 octane fuel. My last, and current Sportster I'm working on to get back on the road, had numerous modifications to the engine, but never did I find premium (93 octane around here) necessary. The bike always ran just great on the 91 octane.
I believe your bike should be good with 87 octane (regular around here). Should you happen to hear a little pinging, which I don't think will happen, move up a step in octane. Buying higher octane than needed does not give you more power on its own,
I've been ridding Sportsters for years and always used ethanol free 91 octane fuel. My last, and current Sportster I'm working on to get back on the road, had numerous modifications to the engine, but never did I find premium (93 octane around here) necessary. The bike always ran just great on the 91 octane.
I believe your bike should be good with 87 octane (regular around here). Should you happen to hear a little pinging, which I don't think will happen, move up a step in octane. Buying higher octane than needed does not give you more power on its own,