1. 2 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
    WR = 2st Enduro & CR = 2st Cross

125-200cc How to tell if brake master cylinder seal is a goner

Discussion in '2 Stroke' started by shawbagga, Jan 5, 2017.

  1. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    Lectronified 2010 WR300 & 2013 WR165
    Shed time today. Top end on 165 done, greased front brake pins, linkage, shock n swingarm. Went to grease rear brake pins n nuthin at the pedal! Havnt ridden the bike for 3-4 months. I've tried bleeding it normally n reverse but won't build pressure! Banjos look ok n hose too. I'm assuming the seal inside the master cylinder has crapped out? Sound feasible? Havnt had much to do with brakes how do I check?
  2. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    Lectronified 2010 WR300 & 2013 WR165
    Got clear fluid cumin out(no air) nipple wen cracked under pressure n fluid level in MC drops every bleed. ???
  3. Huskynoobee CH Sponsor ZipTy Racing

    Location:
    Castaic, CA
    Husqvarna Motorcycle:
    2011 TE449 2006 WR250
    Other Motorcycles:
    HD Ultra Classic, IT200, SV650s
    It's not sucking air from the drain line right?
  4. johnnyboy Husqvarna
    Pro Class

    Location:
    UK
    Husqvarna Motorcycle:
    WR 125
    Other Motorcycles:
    TM 250f
    try prying the pads apart in the caliper to see if the piston has seized .
    Huskynoobee likes this.
  5. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    Lectronified 2010 WR300 & 2013 WR165
    Roger that will try giv it a crack. Nah not suckin air wen bleedin via nipple(pedal down crack nipple then tighten again before releasing pedal). Took MC off n held it up high to make sure no air in line n pumped sum fluid reverse with a syringe. Pure fluid no bubbles. I'll report back after prying piston hopefully sumthn easy like that. Cheers boys
  6. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    Lectronified 2010 WR300 & 2013 WR165
    Pistons not seized. Pried em apart but not even any pressure to push them in at all
  7. lankydoug Husqvarna
    Pro Class

    Husqvarna Motorcycle:
    WR
    Take the master cyl apart and inspect the seals and you should find the problem if it has one. One thing you should check before you do that is make sure your brake pedal has some free play. If the master cyl piston doesn't travel all the way back to the stop it wont uncover the small hole that relieves the pressure and allows it to get a new charge of fluid to pressurize the brakes.
    steadydirt likes this.
  8. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    Lectronified 2010 WR300 & 2013 WR165
    Yeh tried it with free play maxed in n out n in the middle Doug. How do these MCs cum apart? Never dun one before looks like a circlip in the bottom?
  9. ohmygewd Husqvarna
    Pro Class

    Location:
    Melbourne, Australia
    Husqvarna Motorcycle:
    13'Berg FE350, 96'WR360, 01 WR250
    Other Motorcycles:
    Aprilia RSV1000
    shawbagga likes this.
  10. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    Lectronified 2010 WR300 & 2013 WR165
    That looks exactly like my bikes MC!

    U did good OMG.
    U did real good.
    ohmygewd likes this.
  11. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    Lectronified 2010 WR300 & 2013 WR165
    Is the above MC off the 09 ktm 530exc stil the standard rear MC? If not wat year did it run to? Tryin to figure out crossover as no listing for Italian husky

    Watched vid n caught the part number 18-1028 so will check it out. Looks easy enough!
  12. jo360 Husqvarna
    AA Class

    Location:
    perth australia
    Husqvarna Motorcycle:
    1983 exc framed wr430 engine
    Other Motorcycles:
    ktm 520exc
    Check your seals on the mc piston and blocked orifices, no resistance at pedal indicates air in system would try sucking oil through from caliper bleed using a syringe to apply vacuum whilst pumping t the brake lever, make sure you put teflon around the thread of the bleed screw to seal it on the threads, dont appy too much suction and clear tube from bleed screw to syringe use g clamps to compress caliper.
  13. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    Lectronified 2010 WR300 & 2013 WR165
    I tried it all(vacuum, reverse, normal, pushin piston back) multiple times think the MC seal is shot so wanna confirm before ordering. 18-1028 is for berg 70 degree engines n other ktms up to 12 by the look of it
  14. jo360 Husqvarna
    AA Class

    Location:
    perth australia
    Husqvarna Motorcycle:
    1983 exc framed wr430 engine
    Other Motorcycles:
    ktm 520exc
    Mx store .com.au all balls rear rebuild kit $33 should be 13mm same as ktm upto 2009 or so.husqvarna same as early ktm.10850511 part number of master cylinder complete.
    ohmygewd likes this.
  15. ohmygewd Husqvarna
    Pro Class

    Location:
    Melbourne, Australia
    Husqvarna Motorcycle:
    13'Berg FE350, 96'WR360, 01 WR250
    Other Motorcycles:
    Aprilia RSV1000
    Italian Husky's and KTM pretty much shared the same Brembo components...that MC looks the same as l have on my 13 FE350!!
    shawbagga likes this.
  16. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    Lectronified 2010 WR300 & 2013 WR165
    Yeh there's a coupla different versions that's all. Late 90s thru to mid 00s then another up to 12/13 then current models ktm/husky. My vast powers of deduction lead me to believe the middle one would be correct one, the early one for the bigger caliper(like on wr300) n the third one for latest gen ktm/husky. Im jus gonna order it-$22AU del from oem cycles in the US. $10 more here?!!
  17. ohmygewd Husqvarna
    Pro Class

    Location:
    Melbourne, Australia
    Husqvarna Motorcycle:
    13'Berg FE350, 96'WR360, 01 WR250
    Other Motorcycles:
    Aprilia RSV1000
    I'm sure Stefan from R&D would help ya...you'll get the proper Brembo kit?
    No part numbers on your MC?
  18. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    Lectronified 2010 WR300 & 2013 WR165
    At work mate so can't check. Proper brembo kit cost a shite load I'd imagine. All balls kit cums with everythin including piston apparently. For $23 worth a shot!
  19. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    Lectronified 2010 WR300 & 2013 WR165
    Ok so jus whacked new MC kit thru n stil no go. Reverse bled, no air bubbles so must be piston seal. Puttin the MC kit thru was easy enough but I gotta buy sum reverse circlip pliers!

    With free play adjusted I can see the piston pulse but it won't cum out
  20. shawbagga Husqvarna
    Pro Class

    Location:
    Eaton, Western Australia
    Husqvarna Motorcycle:
    Lectronified 2010 WR300 & 2013 WR165
    image.jpg these 3 little notches r all I could find wrong with the piston seals in MC. Was really hopin it was my issue but seems not!
    juicypips likes this.