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Are 650/750 Carbs (off of 81-83 YICS Motors) the Same?

Discussion in 'XJ Technical Chat' started by mwhite74, Aug 31, 2012.

  1. mwhite74

    mwhite74 Member

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    As per the subject,

    I'm looking at a 81 750 as a "winter project"... I know the carbs are both hitachis, but would they be the same model as what's on my 650? HSC-32s or HSC-33s? If so I know mine should be clean enough, would be great to have a second set or even another bank to clean up and keep/sell.

    Thanks!

    Marcel
     
    mwhite74, Aug 31, 2012
    #1
  2. LVSteve2011

    LVSteve2011 Member

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    According to the Haynes manual, BOTH engines use the same carb set, HSC-32.
     
    LVSteve2011, Aug 31, 2012
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  3. maverickbr77

    maverickbr77 Member

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    same carb hsc-32, different jets though
     
    maverickbr77, Sep 1, 2012
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  4. mtnbikecrazy55

    mtnbikecrazy55 Active Member

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    good call
     
    mtnbikecrazy55, Sep 1, 2012
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  5. day7a1

    day7a1 Member

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    Different jets, AND DIFFERENT emulsion tube needles...check the catalogs, they have different P/N's.

    Not that changing jets and needles will contraindicate a second set of otherwise identical carburetors.
     
    day7a1, Sep 1, 2012
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  6. MN-Maxims

    MN-Maxims St. Paul Minnesota

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    Double check all the air jets also.

    MN
     
    MN-Maxims, Sep 1, 2012
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  7. mwhite74

    mwhite74 Member

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    Wow thanks guys for the info! If anything its nice to know I'll have a spare bank of carbs, more or less!
     
    mwhite74, Sep 1, 2012
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  8. tskaz

    tskaz Active Member

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    650 HSC32 carbs -
    Main jet: 110, Pilot jet: 40, Main air jet: 50, Pilot air jet: 195, Needle: Y-10

    750 HSC32 carbs -
    Main jet: 120, Pilot jet: 40, Main air jet: 80, Pilot air jet: 225, Needle: Y-13

    Needle jet is the same for both. 3.2mm
    Fuel level on both is 3.0mm +/- 1mm
     
    tskaz, Sep 1, 2012
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    wgul likes this.
  9. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    I adapted 650 Maxim carbs for my 750 Seca by doing the above swaps.

    Kept me from having to do throttle shaft seal surgery.
     
    TIMEtoRIDE, Sep 1, 2012
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  10. mwhite74

    mwhite74 Member

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    That's my plan (if I get the bike that is). I can see that the ones on the SECA were leaky, although I've split a rack before it would save me some time for sure.
     
    mwhite74, Sep 1, 2012
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  11. LVSteve2011

    LVSteve2011 Member

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    +1 to Tskaz, for the elaboration.
     
    LVSteve2011, Sep 1, 2012
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  12. mwhite74

    mwhite74 Member

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    Yep, thanks, this info will be handy!
     
    mwhite74, Sep 1, 2012
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  13. biggs500

    biggs500 Active Member

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    It's not hard. More time consuming than anything else. Good bonding experience with your ride. :)
     
    biggs500, Sep 1, 2012
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