Maintenance & Technical > KX250 / KX125

Rear breaks keep locking up.....

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Motorrad:
Take the caliper appart... its stuck/sticky/rusty.   rebuild it if its salvageable.

joetaco87:
Well, went for about a 6hour ride saturday and the breaks just started to lock up once. I had brought a 10mm wrench along just incase so I bled them out on the trails and it didn't do it again.  Could there have been to much fluid in them so that it couldn't return to the resivoir?

Danger4u2:

--- Quote from: Motorrad on May 22, 2009, 04:25:18 AM ---Take the caliper appart... its stuck/sticky/rusty.   rebuild it if its salvageable.

--- End quote ---
Sounds like the problem.

kaw rider:
Sounds like maybe you still have some water in the system and it's expanding.

BDI:

--- Quote from: kaw rider on May 25, 2009, 04:26:40 AM ---Sounds like maybe you still have some water in the system and it's expanding.

--- End quote ---
Thats what I'm thinking. If it was stuck do to rust cracking the bleader open wouldn't do any thing for it. I would take the whole rear brake system apart and inspect everything and clean it all out with brake parts cleaner and compressed air to insure there is no water left. the water will go to the lowest part of the system and bleading the brakes might not get it out. The new fluid may just keep going over the top of the water and never push it out.

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