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Thread: 350X Choke valve plastic replacement

  1. #1
    Join Date
    Aug 2004
    Location
    Phoenix
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    1,229

    350X Choke valve plastic replacement

    So its time for a carb rebuild on the 350X. The choke valve plastic knob on top has cracked in 2 pieces making it unusable, of course its discontinued like everything else it seems. Looked around for used but no luck and anything out there is around 35 years old and likely to also have the same fate soon. Is there another similar keihin/honda carb model that uses a close choke setup anyone has found? I wouldn't even mind converting the lever setup to button type also.
    Remove all the warning label and let nature take its course

  2. #2
    Join Date
    Oct 2002
    Location
    Northeast
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    17,490
    I though the 350X choke was all metal? Just a rubber cap on top to seal it.

    Or maybe your running the 400EX carb with the yellow plastic choke lever?

    Did you mean the idle screw??
    All our government does is distract us while they steal from us, misspend our tax $ and ruin our country

  3. #3
    Join Date
    Aug 2004
    Location
    Phoenix
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    1,229
    [QUOTE=Dirtcrasher;1495824]I though the 350X choke was all metal? Just a rubber cap on top to seal it.

    I'm not talking about the metal lever. I'm talking about the plastic piece that threads into the carb body. The plastic piece also holds the brass choke plunger in the open and halfway position. It's broken horizontally and I had to extract the threaded portion out. I prefer not to take the choke out and seal up the orifice as 350x's can be a bear to start cold blooded.
    Remove all the warning label and let nature take its course

  4. #4
    Join Date
    Aug 2004
    Location
    Phoenix
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    1,229
    6 years later and it looks like the china aftermarket junk have now made a complete carb for the 350X. I'll have to buy one just to rob for for the choke plungers assembly.
    Remove all the warning label and let nature take its course

  5. #5
    Join Date
    Aug 2004
    Location
    Phoenix
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    1,229
    So as a last ditch effort I took a chance and ordered a choke plunger for Keihin PWK series, these can be had on ebay for around $10. You will only be using the plastic threaded portion and rubber cap. Get a pair of dykes and cut the shaft by the choke knob enabling you to remove the plastic nut and rubber cap to put on the OEM 350X choke valve. It was a perfect fit, and holds the choke lever in it's correct positions! The pics attached are a cut PWK choke plunger and the OEM 350X choke shaft. As a side not keep those OEM carbs people!! They are superior to the china knock off stuff out there. So sad to see many oem carbs being tossed to the trash because people can't properly rebuild or tune them so they say "I can go get a new carb for $40" but the quality and precision just isn't there....
    Attached Thumbnails Attached Thumbnails 8fb632b1-ff7d-4fe3-9efd-79bd335b0671.jpg   f28e20be-e6b6-4651-9d6e-30e364ed5d28.jpg  
    Last edited by 3Razors; 03-07-2026 at 05:05 PM.
    Remove all the warning label and let nature take its course

  6. #6
    Join Date
    Mar 2010
    Location
    Arizona
    --
    507
    Good idea and nice inexpensive fix.

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