No brakes after a long sit?

Discussion in 'Thumpers' started by Makwa, Jul 1, 2013.

  1. Makwa

    Makwa Adventurer

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    The EXC 450 I just picked up doesn't have any brakes. I argue that bikes like this do not necessarily NEED brakes, but alas, I have been outvoted and need to fix them. :evil

    The bike has sat unused for 2 years. They worked when it was parked.:huh

    I am going to try to bleed them now that I have the DOT 5.1 fluid. (Glad in my older age I have learned to read instructions... ie, manuals) :deal

    Is this a common issue?

    Anything I should be on the lookout for or should do?
    #1
  2. Navin

    Navin Long timer

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    Air in the line all gathers at the uppermost point in the loop on the KTM EXCs, try back bleeding the caliper with the cover off the master to start.
    (knee against caliper, slowly press till it bottoms out the pistons)
    #2
  3. Grreatdog

    Grreatdog Flamed out

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    It is a very common issue. My MXC tends to sit for long periods between rides so I used to have to bleed the brakes before every ride. After researching it a bit I learned using a small bungee cord to hold a bit of pressure on the lever prevents it. No problems since I started doing that. Well, except I forget about the cord sometimes and can't figure out why I can't push it out of the garage. :lol3
    #3
  4. crazybrit

    crazybrit Long timer

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    +1.

    If it's chronic, ziptie lever to bars (i.e lever fully applied). Overnight usually fixes it.
    #4
  5. Young-Gun

    Young-Gun KTM Tragic

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    So it will actually fix it or is this process only useful for prevention?
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  6. Fire Escape

    Fire Escape Long timer

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    I guess that depends on your definition of 'fix'. My GG went from no brakes to good brakes overnight with the bugee trick. If the problem returns over time (weeks or months not days) was it 'fixed'? It certainly makes the brakes work though, something I have not always been able to do by bleeding.


    Bruce
    #6
  7. Young-Gun

    Young-Gun KTM Tragic

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    Excellent! So tonight... I go home, squeeze the lever as far as I can against the grip, secure in place for a day or two and I should be good to go? Worth a try! Will report back
    #7
  8. Grreatdog

    Grreatdog Flamed out

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    If not, the back bleeding per the first post should do the trick. Take the cover off the master cylinder, turn the bars to get it up to the highest point you can and as level as you can, press the piston back into the caliper and then pump the brake back up at the lever keeping an eye on the fluid level. Then do the bungee trick.
    #8
  9. crazybrit

    crazybrit Long timer

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    I thought there was a plan-b if the bungee didn't work before trying bleeding (plan-c). Removing the master cyl off the bike and hanging the whole assembly from garage rafter. Then retry the bungee. Something about the way the hose routes when on the bike causes air to get trapped. I forget the details (it's on ktmtalk) as I've never needed to do it, the zip-tie around the lever/grip has always worked 100% for me on the bike.
    #9
  10. Navin

    Navin Long timer

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    Brembo mastered bikes should be parked with the bars to full left steering lock too.
    #10
  11. Makwa

    Makwa Adventurer

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    This.... worked like a champ :clap

    I will definately do this. Hopefully it will not sit long anymore :wink: but one can never tell.

    Thanks for the suggestions fellas!
    #11
  12. Navin

    Navin Long timer

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    Bravo. I usually start the day with a good back bleed or two on both front and rear calipers on my Brembo braked bikes. Good to do right before starting them up.
    #12
  13. Young-Gun

    Young-Gun KTM Tragic

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    It worked!!!! :clap
    #13