What octane are you running in your 450?

This is a discussion on What octane are you running in your 450? within the Engine/EFI/Drivetrain forums, part of the Can-Am DS450 Tech Discussion category; I run 110 usually mixed with 92 in my Honda CRF250R and it loves the high octane. I have run that mix in my Honda ...


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Old 09-22-2009, 06:57 PM
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What octane are you running in your 450?

I run 110 usually mixed with 92 in my Honda CRF250R and it loves the high octane. I have run that mix in my Honda 400ex as well and it seems to run better. The 450X shows minimum of 91. Is the general concensus to just run premium; 92 or better?
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Old 09-22-2009, 10:25 PM
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I have just run 91 or 93 pump gas in mine so far with no ethanol. That was all I ever did with my canondale and it ran like a top all the time I had it.

So did you get the DS yet?
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Old 09-23-2009, 12:21 AM
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I run 91 pump gas with no ethanol also. Really isn't a need to go any higher on a stock engine.
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Old 09-23-2009, 07:52 AM
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110.. but thats cuz the high compression piston
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Old 09-23-2009, 08:49 AM
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I run aviation fuel, its leaded 100 octane, but that's is because compression. I ran premium pump gas when my motor was stock.
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Old 09-23-2009, 10:36 AM
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is it safe to run leaded fuel in a stock 450x?
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Old 09-23-2009, 01:13 PM
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Nooooooooooooooooooooooooooooooo
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Old 09-23-2009, 07:45 PM
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leaded fuel ?whats this 1970
??????
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Old 09-24-2009, 02:24 AM
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blaster was that a typo? do they even make leaded fuel anymore? i know nothing about aviation fuel but it cant be leaded, can it?
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Old 09-24-2009, 09:22 AM
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VP still has leaded fuel C12 is leaded
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