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Hello everyone,I have brake questions.

Discussion in 'XJ Modifications' started by Heater68, Sep 28, 2008.

  1. Heater68

    Heater68 New Member

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    Hi,I have a 1981 xj650 and supposedly a former owner swapped the front end with a xs1100 ? front end ? It now has dual discs upfront. I wanted to know if I should keep the standard master cylinder or is the 1100 master different? I'm not sure what I have right now. Suggestions? Thanks in advance. :?
     
    Heater68, Sep 28, 2008
    #1
  2. wizard

    wizard Active Member

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    the external appearance of the two differs, the 650 is rectangular, while the 1100 is tapered. The 750 has the same shape as the 650, but works 2 callipers, so the insides are different.
    part #s
    650.....4H7-25850-01-00
    750.....1OL-25850-00-00
    1100....1J3-25850-23-00
     
    wizard, Sep 29, 2008
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  3. Heater68

    Heater68 New Member

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    Thanks,wizard. I will check it out because my front brakes are virtually nonexistent. Thank again.
     
    Heater68, Sep 29, 2008
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  4. MBrew

    MBrew Member

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    The main difference between master cylinders is the size of the bore. I used to have a list of what sizes the various XJ bikes used, but I can't find it. Mike's XS site has some good information on going from single to dual caliper setups
     
    MBrew, Oct 19, 2008
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