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Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust Problems, advice and/or how tos for Sporster and Buell motorcycle carburators, Electronic Fuel Injection (EFI), Air Intake, Fuel and Exhaust.

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View Poll Results: What grade gasoline do you use?
Premium Gas 91+ octane 3,707 81.94%
Mid-Grade Gas 89-90 octane 311 6.87%
Regular 87 octane 383 8.47%
I mix it up, don't care, etc. 104 2.30%
Change based on the weather 19 0.42%
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  #21  
Old 26th February 2006
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I use premium each and every time. Might cost as much as forty cents more at fill-er-up time, but my feeling is: air cooled motor, reasonably high compression, large bore...why tempt the detonation derby?

Kim
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  #22  
Old 26th February 2006
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always use premium...
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  #23  
Old 26th February 2006
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Quote:
Originally Posted by jhawkr
I would think that if your bike runs well on Regular grade, poking the premium knozzel in its tank is really just throwing away money. I think I'm going to try at least the mid-grade to see what happens.
I certainly agree. If your bike runs well on 'x' grade fuel, without detonation, that is all you need to use. Using a higher grade would be wasting money.

Kim
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  #24  
Old 26th February 2006
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I always use 91 (unless I am on reserve and the gas station only carries 89 - happened a few time in Kansas.)

It is what my manual requires for the '05 1200C.

Funny thing, I rarely have carb farts or other whacko detonation-type noise, that I can hear. (But, my hearing has been damaged over the years.)
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  #25  
Old 26th February 2006
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premium all the time,sunoco 94 if I can get it
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  #26  
Old 26th February 2006
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I found a station locally that sells 100 octane....is this bad for my 04 1200r????
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  #27  
Old 26th February 2006
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93 octane all the time.
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  #28  
Old 26th February 2006
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I use the best I can get!!!!

Nothing is to good for my Sporty!!!
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  #29  
Old 26th February 2006
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I always use premium gas.
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  #30  
Old 26th February 2006
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I wonder about using the E85 ethanol gas mix, supposedly it gives more power, and enables more advance on timing. No real issues for seals etc. You could use a teflon PTE fuel line, and those with adjustable ignition might be able to tune it to optimum. What do ya think, is it possible, or would their be other adverse effects.
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