Progressive rear spring on 640 Adv???

Discussion in 'Thumpers' started by BirtDike, Nov 12, 2007.

  1. Zerodog

    Zerodog Long timer

    Joined:
    Jun 9, 2006
    Oddometer:
    1,233
    Location:
    SLC, UT
    As long as it is a 59mm ID spring it will work. I doubt it. It is most likely a 62mm one from another KTM. It will fit but it will slop around on the shock and rub the res.

    Yes that is a straight rate spring. It is in the part #. It is an 8.4 x 250mm spring. If it was a progressive it would say PDS 6 or something like that. Or have something like this 7.6-9.5 260.

    If it is a 59 slap it on and try it out.
    #21
  2. BirtDike

    BirtDike Like herding cats

    Joined:
    Feb 2, 2007
    Oddometer:
    52
    Location:
    A Kiwi Living in London
    Hey fellas,

    Sorry, I didn't mean to abandon this thread, but things were a bit hectic at work this week, and I've hardly been at home. Really appreciate the input from everyone.

    Zerodog - I'm going to send you a PM about all this stuff, and hopefully we can sort something out between us. Sounds like I want to go higher than the 80/260 I can souce here - and am open to any advice you can give.

    I'll update the post once we sort out the best option, and once I get it all fitted.

    Cheers!

    BD
    #22