Maintenance & Technical > KX500 Original

no brake pressure

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KX925:
 :? Okay i'm hoping someone can help me,I have a 1991 KX500 and i took it apart for the winter, i took the brake lines off and hung them up, now when i put them back on, i'm getting pressure in the rear but no pressure at all in the front, they worked fine when i took it apart, i've bled them about a million times even tried zip tying the lever overnight, nothing, i'm getting fluid to the caliper because when i open the bleed nut fluid comes out but the front brake will not build pressure, is it something easy i'm missing this is very frustrating. would it be the front caliper? the master cylinder? can someone PLEASE help me i'm begging you, it's nice enough to go riding and my poor beast is sitting in the garage, thank you in advance.

maddoggy:
sounds like something dried out in the master. take it apart and look at the seals. i'll bet you find the problem. when you leave brake components disassembled for long periods of time orings and seals dry out and crack.

Friar-Tuck:
KX 9,
 I think I would remove the caliper and push (collapse) the pistons in the caliper completely.  Remove the cap from the master cyl and see if you get any air bubbles.  I'm wondering if you have air in the brake cyl, and squeezing the lever is just compressing the air in the caliper and not pushing them against your rotor.
   The other thing this may accomplish is force any air out from the master.  
  Wrap some rags around the master when you remove the top, and be mindful if you squeeze the pistons in the caliper too hard/fast it will shoot up and out of the master.
   Tuck\o/  

KX925:
ok thanks you guys i'll try both thank you again.

Friar-Tuck:
 Good luck,
It is a pretty simple system so eliminating one part of the equation at a time should reveal the culprit.
  Mad Dog also brings up an excellent point about the seals drying up with no fluid in them.
  Tuck\o/

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