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  1. #1
    Alaskan bobarito's Avatar
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    May 2006
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    Gary Fisher Piranha
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    Front Disc brake not working well? Why?

    I've had my new Gary Fisher Piranha for about a month or so. It has Hayes HMX-2 Mechanical discs and they have worked great for the ~250 miles that I've put on the bike. I went on a long ride this week that had some very muddy areas. The front brake didn't work very well after the muddy stretch and now, days later, isn't any better. I hosed the bike down after the ride and oiled the chain, but, of course, didn't get any oil near the front brake at all...I know that fouls the pads.

    How is it responding? I'll try to explain. Pulling on the lever seems to take too much force, first of all, to get any braking power. Much more than the rear brake, which is smooth as silk. And to try and stop the bike using only my front brake (for experiment sake), it takes a serious squeeze...way too much. I can't make my rear tire pop off the ground at all with my front brake, when before, I could easily have done this.

    I'm fairly new into mtn biking and learning every step of the way. It seems to me that either the brake pads are screwed, or the brake cable got some gunk up in it, or a combo of both? Should I lubricate the pivot on the hayes brake occasionally? What could the mud/water have done?

    Thanks!

  2. #2
    ÖöÖöÖöÖöÖö Dannihilator's Avatar
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    Oct 2002
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    Change the housing and cable out for new. If it is still hard after that, the caliper is completely messed and will likely need replacing.
    Strike like an eagle and sacrifice the dove.
    Quote Originally Posted by scrodzilla
    I'm going out on the town tonight and it won't be over until I snort a line of habanero seeds off the hood of a red Fiero.
    Words and Stuff.

  3. #3
    Senior Member
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    Aug 2005
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    Check the pads, if they are resin, they can sometimes wear down extremely quickly in muddy/wet conditions if not burnt in properly (within hours).

    Could also be the caliper alignment relative to the rotor, or the pad distance to the rotor which can be adjusted fairly easily.

  4. #4
    Elite Rep
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    If its hard to squeeze, then definatley replace cables/housing. The pads COULD be a problem aswell as mentioned above.

  5. #5
    Always find my way home
    Join Date
    Dec 2005
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    Kankakee, IL
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    Look at the caliper/rotor from above and observe while squeezing the lever...Does the rotor appear to twist or bend with contact from the pads? Caliper may be misaligned and the mounting bolts arent secure. If no, then possibly friction in cable housing from mud/crud. Maybe dripping lube onto the bare wire near caliper with bike upside down (allowing lube to run down wire into housing) will loosen it up some. If it does then Id consider replacing it with new to bring the original feel back.
    Seriously doubt its the pad wear after only 250miles esp. since you say the lever is hard to squeeze.
    "Send lawyers, guns, and money"

  6. #6
    You need a new bike supcom's Avatar
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    Take it back to you LBS for warranty service.

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