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What pilot jet type is this?

  1. #1
    Lifer
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    What pilot jet type is this?

    My Chinese 250 dirty bike needs a new pilot jet to fix a lean issue. For the life of me I can not figure out where to get a new pilot jet. I am contemplating drilling out bigger but that's a new truck for me and if I mess it up I'm screwed.
    Anyone know what type this is?What pilot jet type is this?-img_20221122_140734702-jpg

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  2. #2
    Lifer Kurlon's Avatar
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    Re: What pilot jet type is this?

    Looks kinda like a Mikuni? https://powersportselite.com/mikuni-...sku=WP144-2325

    If I had it in hand I could compare it against my brass collection better.

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  3. #3
    Lifer
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    Re: What pilot jet type is this?

    It's kind of reversed from the mikuni. It's hard to tell from my pic but the threaded part on mine is the base.

    The closest jets I can find are these keihin ones. If I cut off the narrow tube section it fits. I tried modifying a few spares of them I have but the pilot orifice is in that narrow tube so when I cut it off the jet hole is far too big.

    https://www.ebay.com/itm/30414014457...mis&media=COPY

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  4. #4
    ^ It's my bike and my car tls25rs's Avatar
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    Re: What pilot jet type is this?

    Can't see what it is in your original picture but there is some type of label engraved in the jet itself. Is it just a number for the size or is there a logo of some sort on the jet?

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  5. #5
    rides bikes
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    Re: What pilot jet type is this?

    I wouldn't hesitate to drill it if you can't find one. You're not taking off much material so low likelihood of screwing anything up. It's also a Chinese 250, so....

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  6. #6
    Kosher Assassin Stoneman's Avatar
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    Re: What pilot jet type is this?

    On the few Chinese ATV's we've had for the kids over the years, we simply replaced the ridiculously cheap and undersized carbs. It just seemed SO much easier than fuckin' with them...

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    Did you grit your teeth and try to look like Clint Fuckin' Eastwood?
    Or did you lisp it all hangfisted like a fuckin' flower?

  7. #7
    Being A Dick PurplePackage's Avatar
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    Re: What pilot jet type is this?

    Get a caliper and set of these

    https://www.ebay.com/itm/301429385413

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  8. #8
    Lifer
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    Re: What pilot jet type is this?

    The logo is like two wings or a shield split down the middle. I didn't bother to look into that because it's Chinese.

    The easy way out is a new carb for sure but I'm being stubborn lol. This carn seems fine. The new main jet made a world of difference. Now the pilot needs help.

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  9. #9
    High maintenance priss
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    Re: What pilot jet type is this?

    Looks like the SSR jets (link). I know this example is from a smaller carb but looks identical. I think Higgins PowerSports is an SSR dealer and not too far from you - could give them a try?
    Attached Thumbnails Attached Thumbnails What pilot jet type is this?-jets5-jpg  

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  10. #10
    Lifer
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    Re: What pilot jet type is this?

    Ooh. That looks like a winner. I'm gonna dig deeper into those.

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