in north America all you need is 91+ r+m/2
With running race fuels you also have to adjust your float(s) in the carb, as the specific gravity of race gas is different from pump gas. Something to think about while pouring $5+ a gallon race gas in your bike because it runs better on it, when it could be your floats are out of adajustment. Just trying to save you all a few bucks!!!
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