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Rear caliper not releasing
- vanlagan
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The bike is a 81 KZ750E2. My rear brake caliper releases fine for a while but then starts to hang as I use it. The whole system is "sterile" as far as cleanliness and well bled. When it starts to hang up I can only get it to release by cracking the bleeder valve or purging the system somewhere else as far foward as the banjo fitting at the master cylinder meaning there are no obstuctions from the cylinder to the caliper.The slides are also clean and move freely. When it locks up the brake pedal has no play, it is stiff. So I put it to you guys, any ideas where to go with this one??
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- wireman
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- vanlagan
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Thanks for the reply.
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- steell
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According to your description of the problem, and the steps you have taken, the logical conclusion is a problem with the master cylinder, something in the master cylinder is not allowing the fluid to return.
My guess is that you either still have air in the system, or the piston in the master cylinder is sticking. Based on the symptoms you describe, I think air in the system is the likely culprit.
Do a search of the archives and look at the number of people that have sworn that there was no way there could be air in the system after they have repeatedly bled the brakes, and later admitted that was indeed the problem
KD9JUR
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- vanlagan
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Thanks
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- btchalice
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Terry Meyer / Wichita KS
76 kz900 w/1000 motor TWZTD
I am not driving too fast, I'm flying too low.
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- vanlagan
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- fixer5000
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did you clean out the spooge hole in the master cylinder? that cased the same problem in my yamaha. you just have to clear it out with a paper clip
terry?? is that a technical name??? spooge??...steve
1978 kz650b pretty much stock
\\\\\\\" get there fast but arrive alive \\\\\\\"
massachusetts
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- mykznme
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btchalice wrote:
did you clean out the spooge hole in the master cylinder? that cased the same problem in my yamaha. you just have to clear it out with a paper clip
terry?? is that a technical name??? spooge??...steve
yup, the spooge hole is right next to the whowhutsit,right below the thingamajig:lol:
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- vanlagan
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Thanks,
Thom
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- apeman
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Petaluma and Truckee, CA -- member since Jan. 23, 2003;
PREVIOUS KZs: 1980 KZ750H with 108,000 miles; 1980 KZ750E with 28,000 miles; and KZ750H street/cafe project, all sold a few years back.
This is what I do for fun, not for work. It is art, with a little engineering thrown in.
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- floridamba
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I've seen it before, if people really try and adjust their brake to be super-sensitive.
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