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HSC33 carb variants

Discussion in 'XJ Technical Chat' started by Henkies, Aug 10, 2014.

  1. Henkies

    Henkies Member

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    Hi,

    I just came across a HSC33 carb that seems to differ from the ones my xj700s has. As shown in the pictures, the pilot mixture screw hole is closed with a brass cap and there's a nipple for a vent tube. On the float bowl is stamped C2 at the place of my forefinger, whereas my other carbs are marked as C3.

    The throttlevalve is interchangeble, so I assume it indeed is a HSC33.
    Can I just take the brass cap out, insert my rubber plug, and close the nipple?
     

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    Henkies, Aug 10, 2014
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  2. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    You may have a carb for the california emissions xj700. (It could also possible that you just have simply the wrong carb somehow)
     
    hogfiddles, Aug 10, 2014
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  3. Henkies

    Henkies Member

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    Then let's just open that brass cap and see how it is designed...
     
    Henkies, Aug 11, 2014
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  4. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    The ca one is simply another port that connects tubes from the carbs to a vapor canister. Then another tube connects the canister to the underside of the CA-specific tank. That tank is designed to vent the vapors back into the tank rather than into the atmosphere.

    I have a canister, but have not been able to get one of the tanks yet---
     
    hogfiddles, Aug 12, 2014
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