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Main jet size

Discussion in 'Kawasaki 250cc In-line 4's' started by benpayne92, Oct 25, 2014.

  1. benpayne92

    benpayne92 Active Member Premium Member Contributing Member

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    I was just reading that on the zxr the 2 inside and 2 outside jets are different sizes how is the size of them determined? Cheers
     
    benpayne92, Oct 25, 2014
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  2. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    Most of the inline 4 250s run bigger jets in the centre to help with cooling as these pistons run hotter. From left to right looking At your float bowls the stock c model jetting is 122,125,125,122
     
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    Th3_Huntsman, Oct 25, 2014
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  3. benpayne92

    benpayne92 Active Member Premium Member Contributing Member

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    Sorry if this sounds stupid but how do I tell the difference?
     
    benpayne92, Oct 26, 2014
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  4. zixxer

    zixxer Well-Known Member

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    it will tell you the size on the jet itself
     
    zixxer, Oct 26, 2014
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  5. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Depending how butchered the top of the jet is and how good your eyes are ......... the square with the little square inside is the Mikuni logo

    MIKUNI_GENUINE_MIKUNI_MAIN_JETS-900374202.jpg
     
    GreyImport, Oct 26, 2014
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  6. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    There is a little number on the side you will see it after removing jets from the housing, they are easier to clean if you remove from the holder as well like below.

    Clean jets.jpg WP_20140512_004.jpg WP_20140512_006.jpg
     
    Th3_Huntsman, Oct 26, 2014
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  7. benpayne92

    benpayne92 Active Member Premium Member Contributing Member

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    Thanks everyone appreciate it
     
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    benpayne92, Oct 26, 2014
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  8. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Also Ben if u are removing them, they can be very soft brass so try to use a slotted driver that fits correctly and steady as she goes.
     
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    GreyImport, Oct 26, 2014
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  9. zixxer

    zixxer Well-Known Member

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    are the screws on the float bowl the jis head screws, remember on mine they were tough to get off without damaging them.
     
    zixxer, Oct 27, 2014
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