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binding brakes on 78 z650 B1 - single disc -
- GalwayZ
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22 Mar 2009 09:34 #274222
by GalwayZ
binding brakes on 78 z650 B1 - single disc - was created by GalwayZ
The front brakes on my 78 Z650 B1 (single caliper,mounted in front of the fork leg) were binding - i rebuilt the master cylinder - no change, replaced the caliper piston and seal, replaced the line - when assembled the caliper slides freely back and over on the caliper mount - wheel turns freely - put a few miles up - use the brakes - presto it binds up again - any ideas ?
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- 650ed
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22 Mar 2009 09:39 #274227
by 650ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Replied by 650ed on topic binding brakes on 78 z650 B1 - single disc -
When it binds can you still slide the caliper in the mount? How do you "un-bind" it? I'm wondering if there's an issue between the pads and the rotor. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- GalwayZ
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22 Mar 2009 09:50 #274229
by GalwayZ
Replied by GalwayZ on topic binding brakes on 78 z650 B1 - single disc -
the caliper locks up tight - have to open bleed nipple - it has even tightened at the lever.
im stumped !
im stumped !
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- arai59
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22 Mar 2009 10:06 #274230
by arai59
Replied by arai59 on topic binding brakes on 78 z650 B1 - single disc -
Inside the M/C there is a little bypass hole. Sometimes they clog up with crud or old fluid. Tiny about the size of a needle. I always take a metal strand from a wire brush and poke the hole thru. It is hard to see but if it is clogged it will not release the pressure inside the cyclinder. You can check it with the cover off. If you poke thru be sure you don't hit the rubber inside the cyclinder. It's best to do this when the cyclinder is out.
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- GalwayZ
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22 Mar 2009 10:14 #274233
by GalwayZ
Replied by GalwayZ on topic binding brakes on 78 z650 B1 - single disc -
M/C is coming off this evening and will give it one more go, after that its off to the breakers in search of parts - thabnks for the tip - will let you know if i have any success!!
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- GalwayZ
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22 Mar 2009 12:18 #274250
by GalwayZ
Replied by GalwayZ on topic binding brakes on 78 z650 B1 - single disc -
Well - Hats off to you - it really is a tiny - tiny - tiny little hole isnt it!!. M/C stripped - hole cleaned out - all reasembled - working a treat. Once again - Cheers for the help.
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