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1973 kawasaki front break sticking when break is applied
http://kawi2strokes.com/forum/viewtopic.php?f=14&t=13021		 Page 1 of 2
Author:  ironhd80 [ Sat Aug 19, 2017 10:47 pm ]
Post subject:  1973 kawasaki front break sticking when break is applied
Rebuilt front master cylender changed the top line was clogged and took caipar apart and cleaned and still sticks and front wheel wont spin rotor is good any ideas what it could be?
Author:  ironhd80 [ Sat Aug 19, 2017 10:53 pm ]
Post subject:  Re: 1973 kawasaki front break sticking when break is applied
Tanner at z1 enterprise has brand new after market calipars for z1.I was told you can run them on h1 h2 is this true. Thank you
Author:  Jim [ Sat Aug 19, 2017 11:03 pm ]
Post subject:  Re: 1973 kawasaki front break sticking when break is applied
ironhd80 wrote:
Rebuilt front master cylender changed the top line was clogged and took caipar apart and cleaned and still sticks and front wheel wont spin rotor is good any ideas what it could be?


Clogged lower line?
Author:  ironhd80 [ Sat Aug 19, 2017 11:56 pm ]
Post subject:  Re: 1973 kawasaki front break sticking when break is applied
Ill check it but i bleed it pump up took all the air out of the line
Author:  DGA [ Sun Aug 20, 2017 1:07 am ]
Post subject:  Re: 1973 kawasaki front break sticking when break is applied
Likely the small expansion hole in the master cylinder is still blocked. If you remove the cap you see two holes, this is the tiny second hole, try a very small piece of wire in it to clear it. Also, make sure the master cylinder piston is free to return all the way back.
Author:  soflah2b [ Sun Aug 20, 2017 7:51 am ]
Post subject:  Re: 1973 kawasaki front break sticking when break is applied
Check for corrosion buildup in the caliper piston "o" ring groove. It will hinder free movement of the piston.
Author:  GUTS [ Sun Aug 20, 2017 12:03 pm ]
Post subject:  Re: 1973 kawasaki front break sticking when break is applied
DGA wrote:
Likely the small expansion hole in the master cylinder is still blocked. If you remove the cap you see two holes, this is the tiny second hole, try a very small piece of wire in it to clear it. Also, make sure the master cylinder piston is free to return all the way back.



This is most likely correct, the hole is very tiny and it's easy to think you have it cleared when it isn't(ask me how I know). You can tell if the piston/pad is sticking by giving the caliper a little smack on the outside with a brass hammer. If it is stuck it will release so at least you can roll it to where you need to work on it.
Author:  H2RTuner [ Sun Aug 20, 2017 3:08 pm ]
Post subject:  Re: 1973 kawasaki front break sticking when break is applied
Yes, Z1 calipers bolt right up. Z1 brake pipe from caliper to rubber hose differs from H series calipers.
Author:  mizike77 [ Sun Aug 20, 2017 8:58 pm ]
Post subject:  Re: 1973 kawasaki front break sticking when break is applied
Clogged return hole in the M/C ..... I have drilled them slightly larger with a tiny jet drill bit
Author:  DGA [ Sun Aug 20, 2017 9:45 pm ]
Post subject:  Re: 1973 kawasaki front break sticking when break is applied
mizike77 wrote:
Clogged return hole in the M/C ..... I have drilled them slightly larger with a tiny jet drill bit

I would caution about doing that, drilling it will leave a small burr under the hole, which is in the master cylinder bore and will kill the seal quickly, also, that hole causes lever sponginess as the very first bit of lever travel squirts fluid back up through it, a bigger hole will let more escape and cause more lever travel. With the master cylinder at rest, riding down the road, that hole is the fluid heat expansion, and pad knockoff (pull back) hole.
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