1. Some members were not receiving emails sent from XJbikes.com. For example: "Forgot your password?" function to reset your password would not send email to some members. I believe this has been resolved now. Please use "Contact Us" form (see page footer link) if you still have email issues. SnoSheriff

    Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

Master cylinder won’t build pressure

Discussion in 'XJ Technical Chat' started by Drake, Jun 15, 2018.

  1. Drake

    Drake Member

    Messages:
    116
    Likes Received:
    17
    Trophy Points:
    18
    Location:
    New Zealand
    Okay guys my stock M/C was stuffed from previous owner crashing the bike.
    81 650 maxim single front brake

    So I fitted a early 2000s Yamaha R1/R6 master

    Brand new braided line
    New master rebuild kit
    New seal kit for calliper
    Been pumping for about 15min and I can’t get it to build any pressure..
    was I ment to bleed the master somehow before installing or something?
    Hate dealing with brake fluid..
     

    Attached Files:

    Drake, Jun 15, 2018
    #1
  2. cds1984

    cds1984 Well-Known Member

    Messages:
    1,029
    Likes Received:
    245
    Trophy Points:
    63
    Location:
    Perth, Western Australia
    try this... gravity feed it to start.
    open the last bleeder on the line and open the MC and keep it topped up, when you get flow without bubbles close the bleeder.
    top up the MC and tap the lines up to it so it releases any air bubbles up to the master and just partially squeeze the lever so the air ends up in the MC.
    Then... bleed as per usual.
     
    cds1984, Jun 15, 2018
    #2
    k-moe likes this.
  3. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

    Messages:
    19,647
    Likes Received:
    6,755
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    ^works every time^
     
    k-moe, Jun 15, 2018
    #3
  4. Drake

    Drake Member

    Messages:
    116
    Likes Received:
    17
    Trophy Points:
    18
    Location:
    New Zealand
    Woo we have pressure you guys are awesome!
    So now I’m bleeding it like usual and I’m getting these tiny little bubbles come out into the reservoir will these stop?
     

    Attached Files:

    Drake, Jun 15, 2018
    #4
    k-moe likes this.
  5. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

    Messages:
    19,647
    Likes Received:
    6,755
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    They will go away eventually. Tap the master cylinder a bit while you have the lever pulled.
    Once things are suitably firm you can go ride it to shake the rest of the trapped air loose , and then bleed the brakes one more time.
     
    k-moe, Jun 16, 2018
    #5

Share This Page