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HELP NEEDED! Derby cover swap

  • Jakebrake
    Jakebrake
    4 years ago
    Guys, 
    Need your advice on what should be a simple one. I am just swapping derby covers on a 04 softail and ive taken the cover off and their is already a thin gasket inserted in the primary case. I want to check that this thin gasket(imaged attached) is sufficent? Or should i also be using the standard disk gasket?


    20200312_200500.jpg
  • Retroman
    Retroman
    4 years ago

    The stock orange or black large O ring works fine , but some aftermarket/accessory derby covers require the large circular gasket.

    Usually both are not used at the same time.

  • micathia
    micathia
    4 years ago
    I have the same question. I bought a Harley derby from ebay and an orange gasket (also Harley one). 
    If I saw this rubber ring on my bike too, do I still use the orange gasket or not? 


    thx
  • Jakebrake
    Jakebrake
    4 years ago
    Quoting Retroman on 12 Mar 2020 12:59 PM

    The stock orange or black large O ring works fine , but some aftermarket/accessory derby covers require the large circular gasket.

    Usually both are not used at the same time.

    Thanks Retro
    So the thin black or O ring thats already inserted into the case in the image. Sorry you will have to zoom to see it, should be enough? 
  • Retroman
    Retroman
    4 years ago

    Yes the stock OEM from new black ( sometimes orange !) large "O" ring works well and is reuseable many times if you are careful with cleaning and placement.

    Sometimes you have to clean them ( don't stretch it !) and put them in a poly bag in the freezer to "shrink" them before carefully replacing them in the groove.

    The groove is in the derby cover itself y'see.

    Those paper/rubber/metal composite full size gaskets ( says face towards clutch or similar on them) ALWAYS fuck up eventually.

    I am starting to wonder if your whole outer primary cover may be aftermarket ? Happens all the time , first thing to get munted on the left side usually.

  • Jakebrake
    Jakebrake
    4 years ago
    Quoting Retroman on 13 Mar 2020 08:35 AMedited: 13 Mar 2020 08:37 AM

    Yes the stock OEM from new black ( sometimes orange !) large "O" ring works well and is reuseable many times if you are careful with cleaning and placement.

    Sometimes you have to clean them ( don't stretch it !) and put them in a poly bag in the freezer to "shrink" them before carefully replacing them in the groove.

    The groove is in the derby cover itself y'see.

    Those paper/rubber/metal composite full size gaskets ( says face towards clutch or similar on them) ALWAYS fuck up eventually.

    I am starting to wonder if your whole outer primary cover may be aftermarket ? Happens all the time , first thing to get munted on the left side usually.

    Awesome, thanks
    I agree, i think its an aftermarket primary as it seems alot of parts on the bike  are aftermarket as i am finding out as i go. 
    I have just used the o ring and tidied it up and well see how it goes.


    20200312_201425.jpg
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