Page 1 of 2 12 LastLast
Results 1 to 10 of 18

Thread: Rear break soft on RR

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Standard Member antonio_beqa's Avatar
    Join Date
    Sep 2019
    Posts
    50
    Thanked: 0

    Rear break soft on RR

    Hello i have such problem on Rear break , while i push pedal first time it goes fully down and on secund push it looks cool , i try it on all modes and also abs off and on , its same , also while bike is stopped in place i check it and same ,so it would not he break pads or rotors , i have new oem brake pads and also new brake fluid , it was doing same in old pads and brake fluid

    I have done a lot of break bleeding mabe 1 litre brake fluid i used to bleed my rear brake but its doing same , i also used GS911 to bleeding but same what would be the reason that in first push pedal is softer and goes fully down and in secund push everything is ok ? If i will not push pedal 15-25 sec then again its soft at first push

  2. #2
    1 YEAR PREMIER MEMBER bananaman's Avatar
    Join Date
    May 2012
    Location
    Kent
    Riding
    Gen4 msport
    Posts
    3,207
    Thanked: 601

    Re: Rear break soft on RR

    Has to be air I'm thinking..... Have you tried taking the calliper off and holding it as high as you can then bleeding?
    Speed doesnt kill, its how fast you stop.......

  3. #3
    Standard Member mike g's Avatar
    Join Date
    Oct 2014
    Riding
    2010 acid green S1000rr
    Posts
    438
    Thanked: 71

    Re: Rear break soft on RR

    have a look at the caliper sliding pins, mine felt ok in that you could move the caliper / piston by hand, but a good clean and regrease sorted it out after all that pads, bleeding and disc run out malarky (only took me 6 years to do!)

  4. #4
    Standard Member antonio_beqa's Avatar
    Join Date
    Sep 2019
    Posts
    50
    Thanked: 0

    Re: Rear break soft on RR

    I have done a lot of bleeding with manual and with gs911 also i dont know how there would be air in sistem , is it possible that master cylinder has damaged ?

  5. #5
    LIFETIME FORUM MEMBER stuartb's Avatar
    Join Date
    Sep 2015
    Location
    Dumbarton, Scotland
    Riding
    HP 4, M Sport
    Posts
    8,011
    Thanked: 2660

    Re: Rear break soft on RR

    Is it a stock rear caliper ?... last one of these I had on the ZX forum and figured it out..... turns out guy had an aftermarket caliper, slung upside down and nipple was on the bottom most part of the caliper !..

    Throw some images on mate, helps us figure out what's what..

    Sent from my SM-G998B using Tapatalk

  6. #6
    LIFETIME FORUM MEMBER stuartb's Avatar
    Join Date
    Sep 2015
    Location
    Dumbarton, Scotland
    Riding
    HP 4, M Sport
    Posts
    8,011
    Thanked: 2660

    Re: Rear break soft on RR

    Also, did you follow the correct procedure with 911 purge.. I done mine last week so it's fresh in my head .

    Sent from my SM-G998B using Tapatalk

  7. #7
    LIFETIME FORUM MEMBER stuartb's Avatar
    Join Date
    Sep 2015
    Location
    Dumbarton, Scotland
    Riding
    HP 4, M Sport
    Posts
    8,011
    Thanked: 2660

    Re: Rear break soft on RR

    Spot the nipple !

    Sent from my SM-G998B using Tapatalk

  8. #8
    Standard Member antonio_beqa's Avatar
    Join Date
    Sep 2019
    Posts
    50
    Thanked: 0

    Re: Rear break soft on RR

    Everyrhing is oem caliper reservior , pedal , pads ,

    In GS911 there is break bleed test but there is not written font or rear when i start testing it wrotes me to push pedal 3 time in 10 secund testing so while it starts bzzzzz sound of abs i am pushing rear pedal for 2 sec each time and doing it 3 time after thet it wrotes test 2 amd doing same thats it

    Do i need to do somthing more with gs911 ?

  9. #9
    LIFETIME FORUM MEMBER stuartb's Avatar
    Join Date
    Sep 2015
    Location
    Dumbarton, Scotland
    Riding
    HP 4, M Sport
    Posts
    8,011
    Thanked: 2660

    Re: Rear break soft on RR

    Beyond that.. the instruction is "Then bleed manually if required"...so run the test and bleed manually.... presumably you don't let the res run dry ? and do you use a bleed bottle with a non return valve ?.. if not Halfords do one for 6 quid, cheap and works fine..

    The front and rear are done separately.. look again, if the M/C seals were fucked you wouldn't get a pedal under any circumstance..


    Post some images of your set up

    Sent from my SM-G998B using Tapatalk
    Last edited by stuartb; 3rd May 2021 at 09:51 PM.

  10. #10
    Forum Moderator alex's Avatar
    Join Date
    Apr 2014
    Location
    London and Norfolk
    Riding
    2017 S1000RR Grey
    Posts
    10,711
    Thanked: 3816

    Re: Rear break soft on RR

    1st press they are always soft IMO. Just a lot of fluid/piston pullback.

Posting Permissions

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