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Hitachi carb id

Discussion in 'XJ Technical Chat' started by Roast644, Feb 18, 2024.

  1. Roast644

    Roast644 Well-Known Member

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    I grabbed a set of carbs out of the pile to rebuild for the '82 750J. I noticed the bowl drains had the dual sided castings which I haven't seen on the Maxim carbs before. Looking at carb pictures online, I see 750 Seca carbs with this feature. Inside they have these jets:

    #128 main
    #40 pilot
    #80 pilot air
    #225 main air

    So they match in stock 750J jets except for the main fuel (#120 stock).

    Are these the same HSC32 carbs as the Maxim with the main swapped out? Or are they for a Seca or something else? And does it matter?

    I read on Len's carb description that the model number for the body is different for the Maxim and Seca. What, if any, differences are there?

    20240218_162620.jpg 20240218_162648.jpg
     
    Roast644, Feb 18, 2024
    #1
  2. kosel

    kosel Active Member Premium Member

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    You should be just fine. I have a spare set with the same bowls. So long as the jets and needles are right for your model.
     
    kosel, Feb 28, 2024
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  3. Melnic

    Melnic Active Member

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    Don't forget to look at the needle
     
    Melnic, Mar 1, 2024
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  4. Roast644

    Roast644 Well-Known Member

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    Needles are the stock Y-13, but they have a shim washer installed. I believe there should be no shims to return to stock jetting.
     
    Roast644, Mar 1, 2024
    #4
  5. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    Correct.....between that and the rather huge main fuel jets, someone sure had a desire to richen that mixture way up......
     
    chacal, Mar 6, 2024
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