I'm not running it in the hope of extra power or better fuel economy, Bill...
Some time back I was having trouble (just occasionally) with my ST not wanting to idle properly on cold start up
When I was trying to find out what was causing it I thought I'd run a few tanks of 98 through it to see if that helped.
Funnily enough at the time it seemed to so I've just continued to use it.
The cold start up issue still happens every now and then so I now figure the 98 fuel & any change in the frequency was just a coincidence.
I'm now thinking it's probably the 4 way pipe issue that I've read about here on the forum.
I'll probably check it out more closely
if it starts to happen more frequently...
By the way, another reason that I'm happy to continue using a higher octane fuel rather than using 91 unleaded is the fact that it can contain up to 10% ethanol.
https://www.bp.com/en_au/australia/home/products-services/fuels/regular-fuels/unleaded-with-e10.htmlAs some may be aware of, ethanol is actually not recommended for Honda motorcycles...
https://www.fcai.com.au/environment/can-my-vehicle-operate-on-ethanol-blend-petrolSo, as I mentioned previously, I don't do all that many K's a year so the added expense of using 98 octane fuel isn't huge...