Gasoline questions ??

Bill Hilly · 02-20-2021, 03:01 PM

From what I gather the compression on the Brozz 250, that I expect to receive in a couple days, is 9-1 . I don't know if 93 octane will offer any power,or anti- knock advantage over 91 octane, but no more fuel than these bikes could consume ,I will probably run 93. My main question is concerning alcohol content of fuel. I know these Chinese bikes come with a smaller than ideal main jet, and I know from some experience with racing that an engine will consume twice as much fuel on alcohol as on gas, and the carb has to be jetted according. If nothing has changed in the last few years we have one gas station that offers pure gas. Will these bikes in stock tune normally run better with gas that has no alcohol. Do any of you mix your own octane booster / fuel recipe?

02-20-2021, 03:01 PM	#1
Bill Hilly Join Date: Feb 2021 Posts: 948	Gasoline questions ?? From what I gather the compression on the Brozz 250, that I expect to receive in a couple days, is 9-1 . I don't know if 93 octane will offer any power,or anti- knock advantage over 91 octane, but no more fuel than these bikes could consume ,I will probably run 93. My main question is concerning alcohol content of fuel. I know these Chinese bikes come with a smaller than ideal main jet, and I know from some experience with racing that an engine will consume twice as much fuel on alcohol as on gas, and the carb has to be jetted according. If nothing has changed in the last few years we have one gas station that offers pure gas. Will these bikes in stock tune normally run better with gas that has no alcohol. Do any of you mix your own octane booster / fuel recipe?
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