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Help Service Parts for rear brake pump? It is brembo?

Discussion in 'Yamaha 250cc In-Line 4's' started by Spark, May 12, 2024.

  1. Spark

    Spark Member Premium Member

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    Hi, currently i am reworking all the breakes of the FZR250R.
    Most of the brake pistons are stuck. The brake fluid smells like beeing 20Years old and is yelly, sealings are brittle and hard as plastics...

    I used the rear brake pump to hydraulically push some of the pistons (rear and front calipers) out, which works better than with compressed air. With this method i found out, that the brake pump cannot apply the pressure it should. The system is free of air with new fluid.
    I guess i need some service parts.
    Is the brakepump really Brembo as it is stated on the housing -or is it fake??
    (I have two FZR250R 89er Model Bikes and they have the same brembo pump?)
    Does anybody the Brembo model number th source spare parts or a suitable replacement part?
    The company of brembo has not replied so far..

    The other brake system is originally Sumitomo like on the 2KR (without label) ?
    Any idea for new pistons and sealings?

    best regards, spark

    IMG_20240511_192456.jpg
     
  2. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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  3. Spark

    Spark Member Premium Member

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    thanks for confirming that they are original and the spare part number. :)
     
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  4. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Beware the All Balls kit for the rear master cylinder on 3LN models - it's actually for the earlier 2KR models and their listing is wrong. Buy an OEM kit if you can.
     
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  5. Spark

    Spark Member Premium Member

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    Hm, okay.
    I will contact brembo for original parts, but service centers are sometimes...
    lets say better organized with own part numbers than with reverse-search on Bike models.
    Do you have any type of brembo-model-id for the pump? I cannot find an id on the housing.
    All listings for "FZR250" and "Brembo" are related to discs and pads. No cross reference to other parts.
     
  6. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    OEM's like Yamaha will contract someone like Brembo to manufacture parts to the OEM's specifications and quite often these items are not sold at retail, except through genuine spare parts from the OEM.

    I suspect this is the case with the rear master cylinder on the 3LN's. Yamaha part number 3LN-W004250 has all the correct parts needed to rebuild the master cylinder.
     
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  7. Spark

    Spark Member Premium Member

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    thx. do you know what the supplier of the brake calipers of model version 3ln1 is?
    Not any longer sumitomo since 2KR? Do you know a good source of brake cylinder replacements and sealings?
    //by the way are they stainless steel or coated?
     

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