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Thread: clutch master cylinder

  1. #1
    Baby Twin
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    Talking clutch master cylinder

    hi guys i am looking for some advice i think the seals are going in my clutch master cylinder and the hayns manual says there is no repair kit available does anyone know of anything that will do the job or do i really have to buy a complete new one

  2. #2
    AMA Pit Boss AREESSMILL's Avatar
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    how do you know that the seals are going?

  3. #3
    Baby Twin
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    the seal in the slave is new and the fluid still keeps going black i also have to bleed it weekly to keep it working and every time i do air comes out

  4. #4
    AMA Pit Boss AREESSMILL's Avatar
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    I would be tempted to change the Slave for an MPL one, and take it from there.
    The blackening of the fluid is the lines along with the seal.

  5. #5
    Baby Twin
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    if i change the slave its not going to help with the master . i forgot if you look where the the lever pushes the piston on the master then you can see a wet patch where the seal is leaking

  6. #6
    spoonz
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    There is no repair kit for the oem M/C i'm afraid.

    Black fluid is common to all Brembo oem systems, you won't fix it.

    i wouldn't buy another oem M/C if you go that route. buy the forged or cast version for 2 reasons

    1. They do rebuild kits @ 35

    2. it's much better quality an doesn't let air in.

  7. #7
    Baby Twin
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    i had a similar problem.
    cant you just use thicker oil?
    the brake oil is really watery and thin

  8. #8
    Baby Twin
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    Talking

    Quote Originally Posted by AREESSMILL View Post
    how do you know that the seals are going?
    they hit their flippers together and blow whistles to say goodbye

  9. #9
    Superbike Twin richmond rossi's Avatar
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    Quote Originally Posted by woollyplaps View Post
    they hit their flippers together and blow whistles to say goodbye
    CLASS.

  10. #10
    Baby Twin pash41's Avatar
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    Ive got the same problem on my 05 (which is why im searchin through old threads for advice!)
    Did you get it sorted? any idea how much for a new un if this is the only option?

  11. #11
    Superbike Twin Leepants's Avatar
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    Quote Originally Posted by spoonz View Post
    There is no repair kit for the oem M/C i'm afraid.

    Black fluid is common to all Brembo oem systems, you won't fix it.

    i wouldn't buy another oem M/C if you go that route. buy the forged or cast version for 2 reasons

    1. They do rebuild kits @ 35

    2. it's much better quality an doesn't let air in.
    Hello! Erm, my M/C is leaking, so where can I get a "better" one, please? Ta.

    Lee

  12. #12
    Superbike Twin Leepants's Avatar
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    Also, mine has a diaphragm in the M/C, and all the tech docs do NOT show it, just the resevoir, the gasket (seal) and the lid...

    http://www.ultimateparts.net/aprilia...nuine-&i=18143 - Item 23 / 24

    I did try it without the diaphragm (it looks like a semi-unrolled condom) and it leaked worse..... :s

    Any ideas?

  13. #13
    Retired
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    Aprilia do not sell spare internal parts for OEM M/C.

    your choices are to replace the whole unit or visit a dealer for a manufacturer that does sell the parts. KTM sell some Brembo spares (dust boot) and the M/C main seals can be had from Honda (not a brembo part but a match size wise)

  14. #14
    Superbike Twin Leepants's Avatar
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    Cheers, Spoonz! Any idea what the Honda bit is, ie what bike it's for, mate? Thanks for your help.

  15. #15
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    Quote Originally Posted by Leepants View Post
    Cheers, Spoonz! Any idea what the Honda bit is, ie what bike it's for, mate? Thanks for your help.
    I have the part numbers somewhere so will dig them out and post up when i find them

  16. #16
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    KTM/Brembo Dust boot - Called a "Rubber Cup" in their parts list is Pt no - 61013008000

    M/C main seal - Honda CB900 RRW 98 (amongst other Honda models) Called a Master cylinder repair kit - Pt no -msr-106

    Ktm sell the parts as they signed a liability waiver with Brembo for diy fitment of the parts. Aprilia etc won't sign it so Brembo will only sell them whole units and external spares
    Last edited by Spoonz; March 29th, 2011 at 10:39 AM.

  17. #17
    Superbike Twin Leepants's Avatar
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    You, Sir, are an absolute bloody STAR! You've gone 2nd in my christmas card list (my mum is first lol ). Thanks VERY much.

  18. #18
    One Liter Duc Eater bryanthegoat's Avatar
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    Hi m8 the ktm kit replaces the whole piston and all the seals part no 61002032000 you should pick it up for around 39 hope this helps.

  19. #19
    One Liter Duc Eater nikfubar's Avatar
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    Nice info cheers, I was also told you can't get spares for the M/C & both my bikes have got a split dust boot which needs replacing although the seals are still ok.

  20. #20
    One Liter Duc Eater bryanthegoat's Avatar
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    I think you will need to check if the kit is for the radial mc or the previous one im not to sure myself, but lookin at the exploded veiw of the mc from ktm its the radial mc....

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