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Fork oil in my Seca 750 1982

Discussion in 'XJ Technical Chat' started by Jan-Olof, Dec 14, 2016.

  1. Jan-Olof

    Jan-Olof New Member

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    Hi

    I have not found the capacity of oil in each forkleg. Does anyone know how much oil and what viscocity of the oil in each leg?
     
    Jan-Olof, Dec 14, 2016
    #1
  2. XJ550H

    XJ550H Well-Known Member Premium Member

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    US XJ750 seca 309cc 10.5 us fluid oz 20 wt fork oil

    XJ750(UK) 312cc 11 imp fluid oz haynes manual states 10/30 motor oil or 10w fork oil


    is your Seca a US model? some of our members go with 15wt fork oil.
     
    XJ550H, Dec 14, 2016
    #2
  3. Jan-Olof

    Jan-Olof New Member

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    Hmm, i live in sweden so i realy dont know, how can i see the diffrence?
     
    Jan-Olof, Dec 14, 2016
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  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    vin number
    and it is my understanding that the word Seca does not show up on euro models

    North American models head light is relay controled always on when started. The rest of the world has on off switch for the headlight

    TECH TOPIC: Model ID and VIN's

    750's:

    1981-83 XJ750 Seca USA: 5G2
    1981-83 XJ750 Seca Canada: 5H2

    COUNTRY: EUROPE
    MODEL NAME: XJ750
    STREET NAME: 1982 XJ750
    MODEL ID CODE: 11M
    FRAME ID: 11M
    SERIAL NUMBER STARTS AT: 000101
    NOTE: styling and features the same as North American XJ750 Seca model, has dual front disc brakes and an oil cooler.


    COUNTRY: JAPAN

    MODEL NAME: XJ750D
    STREET NAME: 1982 XJ750
    MODEL ID CODE: 22N
    FRAME ID: 5G8
    SERIAL NUMBER STARTS AT: 020101
    NOTE: this model features fuel injection and the same style appearance, bodywork, and wheels as the XJ650 Turbo models. Front forks featured the XJ750 Seca style anti-dive system.


    COUNTRY: OE

    MODEL NAME: XJ750
    STREET NAME: 1982 XJ750
    MODEL ID CODE: 5N1
    FRAME ID: 5N1
    SERIAL NUMBER STARTS AT: 003101
     
    XJ550H, Dec 14, 2016
    #4
  5. hogfiddles

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

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    Ask it a question and see if it answers in english.

    For real, though, if it's a USA bike, the speedo would be in MPH.
     
    hogfiddles, Dec 14, 2016
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  6. MICHAEL W BLUMER

    MICHAEL W BLUMER New Member

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    The oil in the bottom where the anti dive valve is ....is that the fork oil?
     
    MICHAEL W BLUMER, Jul 15, 2018
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  7. hogfiddles

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

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    Part of the anti-dive system is linked to the brakes........the brake fluid pushes a cylinder to reduce dive, yet allows for excessive for of a bump or something to push back to control the bump, etc......

    So, basically fork oil on one side or the valve, brake fluid on the other side of the valve.
     
    hogfiddles, Jul 15, 2018
    #7
  8. k-moe

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

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    I'm guessing tht you want to know how to fill it.
    The fork oil side of the system automatically fills when you replace the fork oil.
    The braks fliud side of the system automatically fills when you replace the brake fluid.
    No special access required.

    Exploded view and rebuild procedures below.
    Anti-Dive Fork Explosion
    Doing the 750 Seca's Forks.. (Rebuild.. now a HOW TO!)
     
    k-moe, Jul 16, 2018
    #8

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