A forbidden thing to do;-) Delinked my brakes.

Discussion in '5th Generation 1998-2001' started by OnlyVfr, Aug 2, 2019.

  1. OnlyVfr

    OnlyVfr New Member

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    I don't remember if I had to drill them.
     


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  2. mtbvfr

    mtbvfr New Member

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    The master cylinder is installed and it appears I have all the air out of the lines but I'm not getting any grip of the disc by the pads. I can push the pedal all the way down but the pads aren't gripping the disc.

    It appears that the caliper is now looser on the disc too.

    I did lower the pedal height slightly. Should I reverse the change?

    I am leaving a weight hanging from the pedal overnight in case that helps as when I used a strong rubber band to keep the front brake lever compressed overnight.

    Prior to all my recent maintenance, the bike has not been ridden for 15 to 16 years.

    Thanks!
     
    Last edited: Apr 16, 2023


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  3. OnlyVfr

    OnlyVfr New Member

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    If you have linked brakes then u probably got air in the system somewhere. Did you try bleeding brakes according to manual?
     


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  4. mtbvfr

    mtbvfr New Member

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    My brakes are de-linked.
     


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  5. OnlyVfr

    OnlyVfr New Member

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    Bleed incorrectly or air is getting somewhere and stops your from bleeding it. Sometimes you have to take brake caliper pistons out or move them a bit, in and out, then try bleeding again.
     


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  6. ace4bike

    ace4bike New Member

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    Hi - thanks for the info.
    I'm currently working on de linking me 1999 FI-X brakes. Not a fan, and the seals going on the secondary master cylinder (£66 for a repair kit) has spurred me on.
    The HEL kit uses the secondary master cylinder, blanked off, and brake fluid stops it pivoting if I'm correct?

    I am looking to fabricate an adapter that does away with the oil (so I don't have to buy the seal kit).

    But, not figured out how to make the rear brake independent?

    Looks like you use a single brake hose from the rear master cylinder, and then a short link hose between where the two original hoses connected?
     


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  7. OnlyVfr

    OnlyVfr New Member

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    Hi,
    Yes, I use a single hose to the back caliper and then short link between 2 inlets. That's all. Front I just rebuilt completely, used CBR900RR calipers and I cnc'ed custom brackets.
     

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  8. Terry Smith

    Terry Smith Member

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    You can also leave the rear calliper completely untouched, and join both standard brake hoses at the rear master, using a double banjo bolt which will be surplus after removing the hard piping between front and back. To do this properly you should also use a smaller rear master (to maintain the hydraulic ratio) e.g. off a CBR600F4 or similar.
     


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  9. Captain 80s

    Captain 80s Member

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    What about plugging the inlet to the center piston circuit and only using the two outer pistons with one brake line? Is there something I'm not considering?
     


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  10. bmart

    bmart Insider

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    I'm wondering the same thing...although I have no issue with my linked brakes.
     


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  11. mello dude

    mello dude Administrator

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    It's been a long while since I did the spin on the calculator, but it came out that I needed a 14mm master with the 3 pistons and a 1/2 inch master if I used 2 pistons. Ultimately, personal taste, I didn't like the idea of having dead weight in the middle of the caliper.....why I decided to use a bridge line between the 2 outer pistons and the center piston. ....check photo on page 1.
     


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  12. OnlyVfr

    OnlyVfr New Member

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    You are right, I did that initially, but then, did short hose and just one long hose, only one hose to the rear then:)
     


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  13. OnlyVfr

    OnlyVfr New Member

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    I had to change rear master for CBR600F4i anyway, because brake pedal was stiff, nearly no movement and very hard.
     


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  14. ace4bike

    ace4bike New Member

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    Does the rear brake work OK with a single hose and a link pipe?
    Did the two lines connection, and the pedal hardly moves.
    Yet to find out how it would wwork when riding,
     


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  15. mello dude

    mello dude Administrator

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    I've had mine that way for longer than 10 years.. .works fine... would do it again...
    [​IMG]
     


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  16. OnlyVfr

    OnlyVfr New Member

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    Everything works well. I had to change to master from cbr600f4i regardless if I had 2 long hoses or just 1 long one and a link. You need to change master for different type.
     


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  17. ace4bike

    ace4bike New Member

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    Does this setup make the rear brake more like original? Normal lever travel and feel?

    I'll go this way before the bike is off the ramp if so.

    Thanks for your info.
     


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  18. OnlyVfr

    OnlyVfr New Member

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    No, you need to use different mc with any setup , short link or dual lines, need other MC.
     


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  19. mello dude

    mello dude Administrator

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    Use a 14mm master cylinder....RC51, F4i, CBR600......
    I purchased a new RC51 mc just because I have RC51 calipers on the front.

    There's nothing special about the brake feel other than it's normal....
     


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