A lot of manufactures of powered equipment are advising to not leave fuel in your machines . I know Steele has there own motomix ... non ethanol fuel for all the equipment .
As for my high compression bikes I'm running VP T4 100 octane . As the other guys said the pump stuff has a shelf life and best to run some type of stable and sea foam every once in a while wont hurt .
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Just amazing what comes out of the pump .