You could also throw some Liqui-Moly shooters in the fuel. They make a fairly big difference on smaller capacity engines.
Not sure that works as small cylinder bikes have quite small jets that block easily.
Didn't 5th gear do a fuel test thing on a car and redex seem to work the best. But that could have been because it was the first.
@lynx started
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You could also throw some Liqui-Moly shooters in the fuel. They make a fairly big difference on smaller capacity engines.