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  1. #1
    one less horse cryptid01's Avatar
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    Need help tuning Hayes hydraulics

    I've just installed some HFX 9 HD's as my first set of disk brakes (finally!). I realize that Hayes typically do not offer the modulation and feel of some other brands, and I can live with that. However, when I pull the lever, they don't engage until they're way too close to the bar...there's probably an inch of free play. I'd like them to hit sooner, and wondered if anyone could offer some tips on optimizing their performance. I tinkered with the set screws, which helped, but not as much as I would like. The brakes came pre-bled...could I rebleed and try and squeeze in more fluid? Shim the pads? Any help is greatly appreciated.

  2. #2
    Senior Member MudPie's Avatar
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    Quote Originally Posted by gastrocnemius
    ... I tinkered with the set screws, which helped, but not as much as I would like. ...
    Is this the 2 mm set screw located at the pivot of the lever?

  3. #3
    Wood Licker Maelstrom's Avatar
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    YEs it is..

    Sounds like you have a little bit of air in there. If the lever is as far out as possible and you pull in to the bar...definately some air. Sometimes manu-pre-bled aren't perfect

  4. #4
    The Man. FoX Rider's Avatar
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    Rebleed and make sure to set the limit screw right. I had the Nines. The screw kept backing out while DHing. Eventually went over to Mags. And despite what some believe they modulate very well. (I haven't been able to get some shuttled DH runs on um) But they are much better then the Nines in modulation and lever feel.

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