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Need needle valve thread size.

Discussion in 'XJ Technical Chat' started by Robert24b, Oct 3, 2023.

  1. Robert24b

    Robert24b New Member

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    Just got a donor bike (xj650 with hsc32 carbs) and the carb has 2 needle valves that were cranked down by a gorilla.
    What size tap do I need to chase those threads? I have since extracted the stripped needles but the threads need help.

    Thanks in advance.

    Edit: this is for the needle adjustment screw next to the choke plunger. Thanks.
     
    Robert24b, Oct 3, 2023
    #1
  2. Roast644

    Roast644 Well-Known Member

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    The pilot screw thread is M6 x .5

    This was as measured on the HSC32 from my 750. I assume they aren't different on the 650....
     
    Roast644, Oct 4, 2023
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  3. Robert24b

    Robert24b New Member

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    You're a life saver! Thanks
     
    Robert24b, Oct 4, 2023
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