OKO jets

Discussion in 'Trials' started by heffergm, May 13, 2018.

  1. heffergm

    heffergm Long timer

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    Are OKO jets sized the same as Keihin's? Like if I have 120 that came with an OKO can I stuff it in the keihin and feel ok that it's really a 120?
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  2. lineaway

    lineaway Long timer

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    They are probably close enough. You going up in altitude?
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  3. heffergm

    heffergm Long timer

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    No, it was just suggested that the 125 could probably be dropped to a 120 so I figured I'd see how it works. I'm on the 48 pilot now.
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  4. lineaway

    lineaway Long timer

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    At your elevation that is two steps. But the bigger step will get you in the range you are looking for faster.
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  5. heffergm

    heffergm Long timer

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    I was winding it out today and it seemed really off on top, like it needed to really be cleaned out.

    Anyway, I haven't heard any knock, so we'll see how it goes.
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  6. 2whlrcr

    2whlrcr gooligan

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    I have never heard of an OKO carb? Keihin knockoff?
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  7. lineaway

    lineaway Long timer

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    Adter having a colonastapy by your vet, I am surpried you can remember anything. A dosage the size of a horse would kill an ordinary man.:D
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  8. Ccullins

    Ccullins Adventurer

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    Yes. I have used them. Been able to swap all parts including jets.

    Back in 2010 I put one on my son's Sherco 125. At the time they came with 26mm Dellorto's. I wanted to put a Kehien on it but thought going to a 28mm would be too much as that's as small as the pwk goes (now all 125's use 28mm carbs) What I found was a OKO that was an exact replica of the pwk with a 24mm bore. It worked awesome! So strong and clean running through the bottom and mid range. It didn't seem to hurt top end, but since my son was only 11 at the time it didn't really matter.
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  9. Ccullins

    Ccullins Adventurer

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    What kind of 125?
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  10. heffergm

    heffergm Long timer

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    The GasGas 280 kind, lol.
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  11. 2whlrcr

    2whlrcr gooligan

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    I'm married to a vet. She puts up with my shit everyday.
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  12. lineaway

    lineaway Long timer

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    Which kind? The one with huge needles or just an attitude.:jack
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  13. lineaway

    lineaway Long timer

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    He just read your post wrong. Thanks for trying Cullins!
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  14. Ccullins

    Ccullins Adventurer

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    :baldy LOL
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  15. Norman Foley

    Norman Foley Devotee of the Husqvarna Supporter

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    heffergm would quit trials before he rode a 125!:photog
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  16. heffergm

    heffergm Long timer

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    Actually, come to think of it I think it was @motobene that suggested the 120... maybe he meant at altitude, I can't recall. I'll go up to the 122 if it seems really off.
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  17. heffergm

    heffergm Long timer

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    Nah... the new 125's are nice. I might end up with one at some point... in the far far future.
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  18. 2whlrcr

    2whlrcr gooligan

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    Cycle of life...start out on a 125, end on a 125...
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  19. Norman Foley

    Norman Foley Devotee of the Husqvarna Supporter

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    Except I swung into the end of life scheme early and in my 40's! I can thank guys like John Penton, Fred Hoess, Shane Watts and Tommy Norton for that!
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  20. motobene

    motobene Motoing for 46 years

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    Yup, that was me. 120 will work better than the porky 125, in any bike, from sea level to about 4,000 feet.

    I've still got the 115 from Colorado national in my '17 250. Runs awesome at 1,600 feet, but I'll toss the tried and true 120 back in.
    #20
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