A place near me sells "real gas," i.e. no ethanol added. I've tried it, as well as octane boost, mid grade, premium, lead substitute, MMO, oil additives, etc., etc., etc., with absolutely no positive effect whatsoever on the racket this motor makes when it's hot. Period.

I love my bike, love the power, the handling, the comfort, the look, the gearing, the brakes, the chrome....the love list is long.

But I hate the noise this motor makes when it's hot. Ain't no gettin' around that fact. It has made the same ping/knock/clatter noise no matter what mods I've done. It did it stock, with pipes, with BAK and jetting, AIS on or off. Nothing has changed this basic characteristic.

If I ever figure out why my bike sounds like a blue printed hot rod when it's cold but a piece of worn out farm equipment when it's hot I'll certainly share it with everyone here; it will be, perhaps, the biggest mechanical triumph of my life!