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1982 Xj750 Maxim vs Seca are the Carbs the same?

Discussion in 'XJ Technical Chat' started by vashtsdaytona, Feb 10, 2019.

  1. vashtsdaytona

    vashtsdaytona Active Member

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    What I hope to be a simple question. are the 750 seca and maxim carbs the same? My memory is telling me yes they are. Hoping someone might confirm that?

    Perhaps jetting was different, but the basic bodies are the same right?
     
    vashtsdaytona, Feb 10, 2019
    #1
  2. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Same carbs, same jetting for the aircooled 750. It's the 650 carbs that are jetted differently from the 750.
     
    k-moe, Feb 10, 2019
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  3. vashtsdaytona

    vashtsdaytona Active Member

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    Thank you that's what I needed. Does that mean that the 650 uses the same bodies as well with just different jets? Or are they all the way different. Just expanding my parts search
     
    vashtsdaytona, Feb 10, 2019
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  4. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Yes. Same bodies, different main jet and jet needle.
     
    k-moe, Feb 10, 2019
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  5. XJ550H

    XJ550H Well-Known Member Premium Member

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    carb specs
    http://xjbikes.wikidot.com/carb-specs

    XJ750 Models:

    Years & Models: 1981-3 XJ750 Maxim, Midnight Maxim, and Seca USA models
    Carb Manufacturer: Hitachi
    Carb Series: HSC32
    Carb Model ID: 15R00 (Maxim, Midnight Maxim)
    Carb Model ID: 5G200 (Seca)
    Main FUEL Jet Size: #120
    Pilot FUEL Jet Size: #40
    Main AIR Jet Size: #80
    Pilot AIR Jet Size: #225
    AIR COMPENSATOR Jet Size: #36
    Starter FUEL Jet Size: #40 (non-replaceable, in float bowl)
    Main jet NEEDLE ID: #Y-13
    Main needle JET Size: #3.2mm (the main needle JET is also known as the "power valve" or "emulsion tube").
    Fuel Level in float bowls: 3mm +/- 1mm (.118" +/- .039")
    Idle RPM's: 1,050 rpms
     
    XJ550H, Feb 14, 2019
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  6. Nuch

    Nuch Well-Known Member

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    This is why I love this place...
     
    Nuch, Feb 14, 2019
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