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Thread: AT Fork Slugs

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    kitped's Avatar
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    AT Fork Slugs

    Bought myself a lathe and milling machine recently and have been having a little play!! Thought I'd try and make some fork slugs to match my rose jointed adjustable rear links, here's my first attempt...just need to work out how to use the milling machine now to mill the flats on the top portion.
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    1998 RD07a White / Red / Blue
    1988 RD03 Marathon Replica Monster
    1989 RD03 Rally Fairing Work In Progress
    1984 QR50 The original mini motocrosser
    2001 KTM 50 Pro Senior
    1999 CR250 Mad crosser
    1996 ZX7R Green Meanie
    1976 CB500T Cafe Racer Work In Progress
    1989 RD350F2 YPVS Ying Ning Ning...

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    BobA's Avatar
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    Re: AT Fork Slugs

    Hmmmm


    Why not go one or two better?


    You could do one of the following...


    1) Buy alloy schrader valves that are usually fitted to sportsbike wheels and fit them into a threaded hole in the top of the slug, so they're like the early AT tops with air adjustable preload.

    2) Incorporate a threaded top bolt, with an O ring seal so that you can tighten it down for some preload.


    Machining the flats will be relatively complicated but not impossible. Another option may be to just put a tapped hole in the top of the slug and fit a bolt with a locknut inside the slug maybe?

    Nice machining!



    Bob
    Cheap and reliable won't be fast...
    Fast and cheap won't be reliable...
    Fast and reliable won't be cheap...



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    kitped's Avatar
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    Re: AT Fork Slugs

    Quote Originally Posted by BobA View Post
    Hmmmm


    Why not go one or two better?


    You could do one of the following...


    1) Buy alloy schrader valves that are usually fitted to sportsbike wheels and fit them into a threaded hole in the top of the slug, so they're like the early AT tops with air adjustable preload.

    2) Incorporate a threaded top bolt, with an O ring seal so that you can tighten it down for some preload.


    Machining the flats will be relatively complicated but not impossible. Another option may be to just put a tapped hole in the top of the slug and fit a bolt with a locknut inside the slug maybe?

    Nice machining!



    Bob
    I did think about possibly doing that and using the quick release air valves, I may do that on the second run. I've got enough material to make 5 pairs. I will stick a pair on my new RD03 project and see how I get on.

    Will have to find out what thread the schrader values are, I was a little nervous about cutting a thread on the lathe but it turned out OK and fits the fork top perfectly.
    1998 RD07a White / Red / Blue
    1988 RD03 Marathon Replica Monster
    1989 RD03 Rally Fairing Work In Progress
    1984 QR50 The original mini motocrosser
    2001 KTM 50 Pro Senior
    1999 CR250 Mad crosser
    1996 ZX7R Green Meanie
    1976 CB500T Cafe Racer Work In Progress
    1989 RD350F2 YPVS Ying Ning Ning...

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    Re: AT Fork Slugs

    Nice bit of work, that.
    Brrrmm - '04 XL650V Transalp in Silver

    It's not a case of whether we can fix it or not - it's more a case of how fixed would you like it?



    Einstein - Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

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