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Help Honda vtr 250 Exhaust.

Discussion in 'Honda 250cc Twins' started by Gizziracer, Jun 12, 2020.

  1. Gizziracer

    Gizziracer Well-Known Member Contributing Member

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    The vtr exhaust has a bolt in each header pipe, (and a hole just in front of the muffler) that’s permanently open. Anyone know what the function is?


    FDCD0E35-FBE0-4C3C-8B71-3EFF667FFFF3.jpeg D56AE123-CBF1-460D-B71C-C32F195E56A6.jpeg
     
    Gizziracer, Jun 12, 2020
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  2. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Usually exhaust gas analysis attachment points.
     
    • Agree Agree x 2
    maelstrom, Jun 12, 2020
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  3. Gizziracer

    Gizziracer Well-Known Member Contributing Member

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    Ok, thanks for that.
     
    Gizziracer, Jun 12, 2020
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  4. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    As Blair said it's for EGT sensor's for tuning at the factory / dealer's ?
     
    my67xr, Jun 12, 2020
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  5. Gizziracer

    Gizziracer Well-Known Member Contributing Member

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    Ok, thanks. Next question is, given these carbs have blanked off idle screws what adjustments are possible? Or do they blank off the carbs after the idle mixture is set?
     
    Gizziracer, Jun 12, 2020
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  6. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Any pic's of the blanked off mixture screw's?
    If they are like little welsh plug's there you can drill a 1mm hole in them, then screw in a self tapper and use plier's to remove it
     
    my67xr, Jun 12, 2020
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  7. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    I was going to say the same thing but thought I would let the VTR owners answer that. Seems they are not about right now.
     
    maelstrom, Jun 12, 2020
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  8. Gizziracer

    Gizziracer Well-Known Member Contributing Member

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    I was just repairing a vtr exhaust and noticed the bolts in the headers.. The bike is actually running beautifully after carb cleaning, starts instantly and revs happily all the way to where it shouldn’t. As the manual tells me not to fiddle with the blanked off screws and it’s running a bog stock exhaust no real need to fiddle I think.. just interested in the how and why of how these things work. Thanks heaps for the responses.
     
    Gizziracer, Jun 12, 2020
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