Results 1 to 37 of 37
  1. #1
    mtbr member
    Reputation: Alexgonzalezmi's Avatar
    Join Date
    Nov 2011
    Posts
    172

    MT8 Post Bleeding Issue

    My left MT8 felt like I had to pull the lever almost to the grip in order to get power. I figured I should bleed it to see if that fixes it. Well after watching both Jude and Bernards video's twice each, I tried to do it. There was a lot of air bubbles. Everytime I pulled the fluid back into the syringe, there was air bubbles gathering in the hose. I stopped when I had the air out of the hose in fluid in both the syringe and the reservoir. I capped everything back up. The brake lever was now very stiff and didnt take much to stop the front wheel on the stand or pushing the bike. The problem, is when I got on the bike and rode it. There is barely any stopping power what so ever. I changed the pads to see if that fixed the problem but I still have no stopping power. The bummer is that I have a race tomorrow and I don't have a front MT8. So what did I do wrong, and what can I do to fix this?

    Thanks for the help.

  2. #2
    mtbr member
    Reputation: dirtyjack's Avatar
    Join Date
    Jan 2010
    Posts
    905
    Quote Originally Posted by Alexgonzalezmi View Post
    My left MT8 felt like I had to pull the lever almost to the grip in order to get power. I figured I should bleed it to see if that fixes it. Well after watching both Jude and Bernards video's twice each, I tried to do it. There was a lot of air bubbles. Everytime I pulled the fluid back into the syringe, there was air bubbles gathering in the hose. I stopped when I had the air out of the hose in fluid in both the syringe and the reservoir. I capped everything back up. The brake lever was now very stiff and didnt take much to stop the front wheel on the stand or pushing the bike. The problem, is when I got on the bike and rode it. There is barely any stopping power what so ever. I changed the pads to see if that fixed the problem but I still have no stopping power. The bummer is that I have a race tomorrow and I don't have a front MT8. So what did I do wrong, and what can I do to fix this?

    Thanks for the help.
    Did you remove the pads and wheel, and use the yellow spacer block while you bled the brakes?

    Sounds like you may have gotten mineral oil on your pads/rotors.
    Search in this forum and you'll find plenty of discussion. In the meantime, you can try cleaning your rotors and pads with alcohol and see if you can re-bed them.
    SantaCruz Tallboy C
    SantaCruz Solo C
    Specialized Fatboy
    Trek Madone 8
    Kestrel RT 700
    Lemond Zurich

  3. #3
    mtbr member
    Reputation: Alexgonzalezmi's Avatar
    Join Date
    Nov 2011
    Posts
    172
    I did all of that. Removed the pads, placed a yellow block etc. I've even put different pads on the bike that work just fine with my other brakes and I cleaned the rotors. The other pads work fine on the same Storm rotors.

  4. #4
    mtbr member
    Reputation: dirtyjack's Avatar
    Join Date
    Jan 2010
    Posts
    905
    Did you try lightly sanding the pads and rebedding them?
    SantaCruz Tallboy C
    SantaCruz Solo C
    Specialized Fatboy
    Trek Madone 8
    Kestrel RT 700
    Lemond Zurich

  5. #5
    mtbr member
    Reputation: Alexgonzalezmi's Avatar
    Join Date
    Nov 2011
    Posts
    172
    Just alcohol. But like I said, I tried new pads but still didn't work.

  6. #6
    RIDE...
    Reputation: MarcoL's Avatar
    Join Date
    Jun 2007
    Posts
    427
    I have same problem, is nothing about the pads, the lever goes down to the grips, maybe aur in the lines, very dificult to bleed

  7. #7
    mtbr member
    Reputation: knl2stl's Avatar
    Join Date
    Jan 2011
    Posts
    248
    I hope the race went well. Were the pads ever fully bedded in? Even new pads won't do much until they are bedded in.

  8. #8
    mtbr member
    Reputation: Alexgonzalezmi's Avatar
    Join Date
    Nov 2011
    Posts
    172
    The "new" pads were actually from my old Avid brakes that were barely used since I bought these brakes shortly after the bike. The brakes worked fine after I installed them and cut the cables. But over time the lever pulled too far and that's when I thought bleeding them would help. Probably going to throw these on eBay and get some Formula R1's or new 2012 XX. I'm not happy right now.


    As for the race, it went as good as it could, I won!

  9. #9
    mtbr member
    Reputation:
    Join Date
    Mar 2011
    Posts
    389
    The breather hole for the reservoir is under the clamp, remove brake from handlebars and check is it leaking there.

    Both of my MT-6 lever bodies are dead, the insert un-threaded itself from the composite upon removal, one of them is leaking now.

  10. #10
    mtbr member
    Reputation: Alexgonzalezmi's Avatar
    Join Date
    Nov 2011
    Posts
    172
    Thanks, I'll look more into that. I noticed fluid but assumed it was me making a mess. I'll give that a look tonight.

  11. #11
    mtbr member
    Reputation: dirtyjack's Avatar
    Join Date
    Jan 2010
    Posts
    905
    Trust me, you don't want XX.
    SantaCruz Tallboy C
    SantaCruz Solo C
    Specialized Fatboy
    Trek Madone 8
    Kestrel RT 700
    Lemond Zurich

  12. #12
    mtbr member
    Reputation: Alexgonzalezmi's Avatar
    Join Date
    Nov 2011
    Posts
    172
    Even the 2012? I heard they fixed their issues.

  13. #13
    mtbr member
    Reputation: 006_007's Avatar
    Join Date
    Jan 2004
    Posts
    8,827
    Quote Originally Posted by Alexgonzalezmi View Post
    The "new" pads were actually from my old Avid brakes that were barely used since I bought these brakes shortly after the bike. The brakes worked fine after I installed them and cut the cables. But over time the lever pulled too far and that's when I thought bleeding them would help. Probably going to throw these on eBay and get some Formula R1's or new 2012 XX. I'm not happy right now.


    As for the race, it went as good as it could, I won!
    I wasnt aware that Avid pads worked on the MT8 - Good to know!

    See, you won - thanks to the lack of brakes!

  14. #14
    mtbr member
    Reputation: Alexgonzalezmi's Avatar
    Join Date
    Nov 2011
    Posts
    172
    Yes, they fit. Maybe not technically supposed to but they did enough to go up and down the dirt road in front of my house. I didn't go for a long ride. Didn't need to.

    As for the race, well, not really because of the bad brake, because I put the Avid Elixir front back on
    Last edited by Alexgonzalezmi; 03-19-2012 at 05:56 PM.

  15. #15
    mtbr member
    Reputation: dirtyjack's Avatar
    Join Date
    Jan 2010
    Posts
    905
    Quote Originally Posted by Alexgonzalezmi View Post
    Even the 2012? I heard they fixed their issues.
    I can't speak from experience with the 2012's, but if you look at the massive number of complaints across the entire Elixir line, you have to ask yourself, do I feel lucky?
    SantaCruz Tallboy C
    SantaCruz Solo C
    Specialized Fatboy
    Trek Madone 8
    Kestrel RT 700
    Lemond Zurich

  16. #16
    RIDE...
    Reputation: MarcoL's Avatar
    Join Date
    Jun 2007
    Posts
    427
    Quote Originally Posted by MarcoL View Post
    I have same problem, is nothing about the pads, the lever goes down to the grips, maybe aur in the lines, very dificult to bleed
    Now i have bleeded them correctly, awesome brakes!!

  17. #17
    mtbr member
    Reputation: Alexgonzalezmi's Avatar
    Join Date
    Nov 2011
    Posts
    172
    Well I ordered new pads because the pull seems perfect after bleeding them again. Hopefully this solves the issue although I'm not real sure it will since I tried different although not the same type of pads and still had the issue after rebleeding again.

  18. #18
    mtbr member
    Reputation: dirtyjack's Avatar
    Join Date
    Jan 2010
    Posts
    905
    One other question - Are you tightening the syringe fitting into the bleed port with a wrench? You can draw air from that fitting if it's not tight enough.

    I'm not crazy about the Magura bleed kit. It seems like a toy kit compared to Avid's. And it's difficult to draw the plunger when you're trying to pull the fluid back. FYI- the Avid syringe fitting will fit the MT's.
    SantaCruz Tallboy C
    SantaCruz Solo C
    Specialized Fatboy
    Trek Madone 8
    Kestrel RT 700
    Lemond Zurich

  19. #19
    mtbr member
    Reputation: Alexgonzalezmi's Avatar
    Join Date
    Nov 2011
    Posts
    172
    I wasn't tightening it and the last time I did. Seemed to work much better. I'm hoping the new pads finish this off. I need the brake back so I can finish my wife's niner.

  20. #20
    mtbr member
    Reputation: dirtyjack's Avatar
    Join Date
    Jan 2010
    Posts
    905
    Quote Originally Posted by Alexgonzalezmi View Post
    I wasn't tightening it and the last time I did. Seemed to work much better. I'm hoping the new pads finish this off. I need the brake back so I can finish my wife's niner.
    Alex,

    this weekend I destroyed one of my MT organic pads, so I stuck an Elixir set I had (one of many from my trials and tribulations with XX brakes) into the rear, and wow, they actually jerk the bike back when I tap them. It was noticeably stronger than with the Magura pad. Modulation required a lot less force than with the M pads.

    I'm going to try another set on the front this weekend.

    They're not quite the full dimension of the Magura pads, but they seem to work better with less surface area.

    And they're cheaper
    SantaCruz Tallboy C
    SantaCruz Solo C
    Specialized Fatboy
    Trek Madone 8
    Kestrel RT 700
    Lemond Zurich

  21. #21
    mtbr member
    Reputation:
    Join Date
    Dec 2008
    Posts
    8
    Dirtyjack, can You make a picture of MT's caliper with Avid's pads or compare size of Magura and Avid pads?

  22. #22
    mtbr member
    Reputation: dirtyjack's Avatar
    Join Date
    Jan 2010
    Posts
    905
    Quote Originally Posted by gabgi View Post
    Dirtyjack, can You make a picture of MT's caliper with Avid's pads or compare size of Magura and Avid pads?
    I'm on the road till Saturday. I'll try to remember when I get back.
    SantaCruz Tallboy C
    SantaCruz Solo C
    Specialized Fatboy
    Trek Madone 8
    Kestrel RT 700
    Lemond Zurich

  23. #23
    mtbr member
    Reputation: Alexgonzalezmi's Avatar
    Join Date
    Nov 2011
    Posts
    172
    Finally fixed this. I put on some Koolstop pads and the bike stops on a dime. Actually stops much quicker than before with the Magura pads. So rebleeding and new pads fixed it. Happy again!

  24. #24
    mtbr member
    Reputation: dirtyjack's Avatar
    Join Date
    Jan 2010
    Posts
    905
    Quote Originally Posted by gabgi View Post
    Dirtyjack, can You make a picture of MT's caliper with Avid's pads or compare size of Magura and Avid pads?
    Here ya go. dimensions shown are pads, not plates.
    SantaCruz Tallboy C
    SantaCruz Solo C
    Specialized Fatboy
    Trek Madone 8
    Kestrel RT 700
    Lemond Zurich

  25. #25
    mtbr member
    Reputation:
    Join Date
    Dec 2008
    Posts
    8
    Thanks a lot Dirtyjack.
    OK- I'm going to buy some Elixir pads and I hope it will works.

  26. #26
    Magura N. America Svc Mgr
    Reputation:
    Join Date
    Jun 2004
    Posts
    248
    Good work gents but please avoid using anyone else's pads!
    First, ours pads are organic and not "sintered" for a reason, too much potential heat generated and rotor wear and others pads in our system are not tested or designed for such.
    Probably during all of your hands on work with the MT , probably contaminated not only the original pads but especially the rotor.
    Remember that as we brake, we lay in pad material into the rotor for a better , ideally "perfect" friction coefficient and this pad material in the rotor becomes contaminated also which then transfers the oils back into the new pads.
    If you look at a brand new rotor with a microscope, you would see porosity in the material, eventually becoming filled with pad material over a short period of time.
    You can salvage the rotor by getting aggressive with the cleaning process, something you can't do with the pads themself.

    Sorry you had such difficulty but also congrats on your perserverence and success!!
    Jude

  27. #27
    mtbr member
    Reputation: dirtyjack's Avatar
    Join Date
    Jan 2010
    Posts
    905
    Quote Originally Posted by judemonica View Post
    Good work gents but please avoid using anyone else's pads!
    First, ours pads are organic and not "sintered" for a reason, too much potential heat generated and rotor wear and others pads in our system are not tested or designed for such.
    Probably during all of your hands on work with the MT , probably contaminated not only the original pads but especially the rotor.
    Remember that as we brake, we lay in pad material into the rotor for a better , ideally "perfect" friction coefficient and this pad material in the rotor becomes contaminated also which then transfers the oils back into the new pads.
    If you look at a brand new rotor with a microscope, you would see porosity in the material, eventually becoming filled with pad material over a short period of time.
    You can salvage the rotor by getting aggressive with the cleaning process, something you can't do with the pads themself.

    Sorry you had such difficulty but also congrats on your perserverence and success!!
    Hi Jude,

    I appreciate you jumping in. I don't believe my rotors are contaminated at all. I have also tried a set of Koolstop pads and they, like the Elixer's, work much better than the Magura pads. I am hesitant to shell out another $30 for a set of Magura pads to prove this theory, but I wasn't happy at all with the performance of the Magura's. Is it possible that Magura had a bad batch of pads? My brakes were shipped from QBP in December/January timeframe.
    SantaCruz Tallboy C
    SantaCruz Solo C
    Specialized Fatboy
    Trek Madone 8
    Kestrel RT 700
    Lemond Zurich

  28. #28
    Magura N. America Svc Mgr
    Reputation:
    Join Date
    Jun 2004
    Posts
    248
    Hi Dirty Jack

    I hear you about shelling out more moolah and I will be glad to help but I have zero extra pads at the moment.
    I plan on more in a week or so coming directly from Germany and will be glad to ship you a set then.

    I am sure you had an early iteration of pads and will benefit from the newest.

    Sit tight for now and remind me if you will to follow up.
    Jude

  29. #29
    mtbr member
    Reputation: dirtyjack's Avatar
    Join Date
    Jan 2010
    Posts
    905
    Quote Originally Posted by judemonica View Post
    Hi Dirty Jack

    I hear you about shelling out more moolah and I will be glad to help but I have zero extra pads at the moment.
    I plan on more in a week or so coming directly from Germany and will be glad to ship you a set then.

    I am sure you had an early iteration of pads and will benefit from the newest.

    Sit tight for now and remind me if you will to follow up.
    Thanks Jude. I'll ping you in a week or two.
    SantaCruz Tallboy C
    SantaCruz Solo C
    Specialized Fatboy
    Trek Madone 8
    Kestrel RT 700
    Lemond Zurich

  30. #30
    Singletrack Addict!!!
    Reputation: Relayden's Avatar
    Join Date
    Jun 2005
    Posts
    893
    I have a set of new MT6 that I've yet not installed. I've been thinking on selling them and getting a set of XTR's. The new shimano's feel awesome, still I don't like the looks of the new levers...

    Basically, my experience as a wrench so far installing all the MT line is

    #1 they are not up to the same power as say Shimano and Avid, etc.
    #2 the lever throu is like, damn am I gonna brake?? MT4 solves this with the contact adjust, that makes me wonder why tha hell did Magura not put it on their more expensive offerings? if you ask me, dumb move.Weight savings, really?? like 5-10g more??
    #3 Only organic pads?? Come on, sintered is where it's at, power along with longevity, thou I still have not owned a set of Maguras on a long term..But plenty others organic and they just suck compared to sintered.
    #4 the bleed port must be handled like its made of fine butter. Iv'e seen one stripped because it was too tight from factory, luckily the lever can be flicked and used on the other side, with it's other port.
    #5, and this is personal, I don't dig the lever shape, it's too flat/wide, in the area where you grab with one or two fingers.

    I must say I like the looks and weight wise they are awesome. Now Jude's post make me wonder, Is there a new pad formula that will finally make them brake for good??
    The world needs a huge socio-economic change...be it. We all need to ride more....

  31. #31
    mtbr member
    Reputation:
    Join Date
    Aug 2007
    Posts
    12

    none

    All ok now
    Last edited by randalnelson; 04-26-2012 at 09:23 PM. Reason: OK

  32. #32
    Maromero
    Reputation: doccoraje's Avatar
    Join Date
    Jan 2004
    Posts
    1,483
    Quote Originally Posted by randalnelson View Post
    I paid big bucks for "The Best" and I am pretty disappointed.
    Do you really think that posting the same words in four different threads is going to help you solve the problem?

  33. #33
    mtbr member
    Reputation:
    Join Date
    Aug 2007
    Posts
    12
    Quote Originally Posted by doccoraje View Post
    Do you really think that posting the same words in four different threads is going to help you solve the problem?
    Well excuse me, just thought someone might have some answers, thought if post was in several spots better chance of getting solutions.

  34. #34
    mtbr member
    Reputation: Alexgonzalezmi's Avatar
    Join Date
    Nov 2011
    Posts
    172
    Koolstop pads solved my problems. They brake so much better an much better than the Avids did. I'm sorry others are having issues. Once I got the 20 dollar Koolstop pads these brakes work amazing. I had sintered stock pads on the rear and organic on the front and went for a 5 hour ride in rain and mud. When I was done the sintered pads were toasted and the organic pads looked unused. Needless to say input the Koolstop on the rear. Seriously buy the Koolstop pads and your issues will be solved.

  35. #35
    mtbr member
    Reputation: dirtyjack's Avatar
    Join Date
    Jan 2010
    Posts
    905
    I've ridden the latest replacement pads from Magura for about 50 miles now, including one race. They are night and day better than my originals. They felt good after only 5 stops while bedding them in, and I did another 5 stops just for good measure. Now that I have that problem solved, and my earlier bleed issues are history, I can enthusiastically give the MT-8's (and Magura support) two thumbs up!
    SantaCruz Tallboy C
    SantaCruz Solo C
    Specialized Fatboy
    Trek Madone 8
    Kestrel RT 700
    Lemond Zurich

  36. #36
    mtbr member
    Reputation:
    Join Date
    Jul 2009
    Posts
    59
    Same story. My mt-8's front and rear would become pretty much useless after a couple of rides after a bleed.Read this thread and bought some red kool-stops problem solved.After about 300 hundred miles including the cohutta 100 on Saturday the brakes are prefect.Glad i read this thread. Thanks.

  37. #37
    mtbr member
    Reputation: dirtyjack's Avatar
    Join Date
    Jan 2010
    Posts
    905
    Quote Originally Posted by hurtknee View Post
    Same story. My mt-8's front and rear would become pretty much useless after a couple of rides after a bleed.Read this thread and bought some red kool-stops problem solved.After about 300 hundred miles including the cohutta 100 on Saturday the brakes are prefect.Glad i read this thread. Thanks.
    You probably have the older Magura pads. The new ones stop just as good as the Koolstop's and the pad dimensions are slightly bigger. I'm sure if you contact Magura they'll hook you up.
    SantaCruz Tallboy C
    SantaCruz Solo C
    Specialized Fatboy
    Trek Madone 8
    Kestrel RT 700
    Lemond Zurich

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •