Front Brake problem.

3 replies to this topic
  • BlackWombat

Posted November 25, 2010 - 02:36 PM


I have a 2001 yz426 and i had to rebuild the master cyclinder and when i put it all together and but it on the bike the front brake doesnt work anymore. I bled it and everything. I put a new master cylinder on my 2004 wr450 and the same thing is happening. Both the front brakes dont work if you guys have any ideas on whats going on please let me know. Thanks and happy Thanks Giving!!!!!!!!

  • bobbrumby

Posted November 25, 2010 - 03:08 PM


sometimes you get wierd airlock: try holding the lever back with a zip tie and let it sit overnight with the lever depressed. This should bleed all the rest of the air out

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Chuck.

Posted November 25, 2010 - 05:35 PM


I've had the same problem when replacing a master cylinder; my fix is to back bleed from the caliper. One way is to pry the pads back from the rotor forcing the fluid back up into the master. Another is to use a bleeder and pump fluid back up into the master.

  • BlackWombat

Posted November 26, 2010 - 05:27 AM


ok i will try these both and ill get back on how it went thanks guys

Related Content


Help with 2000 yz426 by weekend woods racer

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  36 replies

yz400f throttle bog by yz400fmaniac

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • * * * * *
  • Hot  28 replies

Need help by Goforaride

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  68 replies

100 hrs on 2014 yz450f, shim valves or replace them? by ttr230rider6

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  79 replies
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.