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  1. #1
    ph2ocraft's Avatar
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    How Important is the Proper Octane?

    I hate the guy who says "It should be all right" just don't give it full throttle.
    Fact is, you're better off running at higher RPM's where the timing is backed off than you are at say 4500 RPM when the timing is advanced, the load is heavy and temperatures rise.
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  2. #2

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    wouldnt it be asking for trouble say if you were cruiseing all day i thought its when the thing has been at wot for an hour and then the 89 octane does its damage

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by ph2ocraft View Post
    I hate the guy who says "It should be all right" just don't give it full throttle.
    Why would you listen to Chris?

    He's just a plumber...

  4. #4
    Ouch!!! What led up to the sieze? The Mag looks a little gray.

  5. #5
    ph2ocraft's Avatar
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    Liz brought her in running and there was absolutely NO damage to the cylinders. I can't tell you how pleased I was to see they were good.

    We were using VP110, just as we have been for the last 100 hours with no issues.
    Compression on the other 2 cylinders is still 160.
    Same timing curve.
    No hydro-lock (This would retard the timing in that cylinder versus advance it anyway??)

    Maybe the formula has changed?
    Sat around at the gas station too long?
    Somebody swapped the labels?
    Grrrr

    I decided to bump the compression, advance the timing and go with C-12.
    Waiting on pistons and seals.

  6. #6
    ceasar's Avatar
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    I'm planning to import some skis (Ultra 250 or FZR) to Sweden from the states, but Ive been thinking about the octane.. Here in Sweden, the standard gas is 95, the premium 98 and you can get up to 99 octane at Shell (called V-power) in the pump.

    I own a RXT - 07 now, which is brought here from the states that I have been running 95 octane in without any problems for 40 h....

    So my question is: Do I have to get another ECU or something that can handle the higher octane better?

  7. #7
    Moderator beerdart's Avatar
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    What method does Sweden use to rate Octane?? In the US we use ROM/MON for automotive fuel.

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by beerdart View Post
    What method does Sweden use to rate Octane?? In the US we use ROM/MON for automotive fuel.
    Quote Originally Posted by ceasar View Post
    ... Here in Sweden, the standard gas is 95, the premium 98 and you can get up to 99 octane at Shell (called V-power) in the pump...
    Octane is measured differently in the US+Canada than elsewhere in the world.

  9. #9
    ceasar's Avatar
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    But what will happen if you run Aspen Racing Fuel in it? Isnt that like 110 octane?

    The reason Im asking about Aspen is the environmental aspect of racing. Aspen has some kind of arkylat (is it called that in the US?) gas, right?

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