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Old 11-12-2010, 10:42 PM   #1 (permalink)
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1984 gl 1200- i rebuilt the rear brake master cylinder about a month ago and the brakes locked again after 3 weeks i followed everyones advice and cleaned the small hole that brakes the front wheel wondering if i need to buy a new one
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Old 11-12-2010, 10:58 PM   #2 (permalink)
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When I had a problem with my brakes sticking, I rebuilt the calipers and found that there was corrosion in the o-ring seats causing the o-rings to apply too much pressure on the pistons and not letting the caliper release. After carefully cleaning outthe corrosion with a pick, the brakes have performed great since! Another place that will cause the pads to stick is the slide pins. Clean and lube those also while you're there!



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Old 11-12-2010, 10:59 PM   #3 (permalink)
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Do both the rear and right front lockup?
If not the problem is in the locked calliper.
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Old 11-12-2010, 10:59 PM   #4 (permalink)
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Try cleaningthe masteragain. Then check the pistons in the caliper, they may be dirty and not be able to work their way back into the bore. You can usuallypush them out far enough to clean them withoutclearing the seal.

Or maybe you should just rebuild the calipers too.



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Old 11-12-2010, 11:15 PM   #5 (permalink)
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yes both front and rear are locked up i took the rear caliper a part and cleaned it the first time it locked then i did the master cylinder it worked good for about 3 week-----i checked the bike after 45 minutes and its free again
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Old 11-13-2010, 12:57 AM   #6 (permalink)
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Sounds like the small pressure release hole is plugged with something, in the master cyl. I use a very small welding tip cleaner
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Old 11-13-2010, 10:15 AM   #7 (permalink)
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gl1200 wrote:
Quote:
1984 gl 1200- i rebuilt the rear brake master cylinder about a month ago and the brakes locked again after 3 weeks i followed everyones advice and cleaned the small hole that brakes the front wheel wondering if i need to buy a new one
Check that the brake pedal is being returned to the full up position, they do get sticky after time.

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Old 11-15-2010, 10:26 AM   #8 (permalink)
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i clened the master cyl and it locked again both front and rear, i rlease the oil in the front caliper and and both where free again.would one of the calipers cause the wheels to lock.
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Old 11-15-2010, 12:31 PM   #9 (permalink)
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If both front & rear are locking it has to be in the master. However, it may not hurt to clean out the hose going from the reservoir to the master.
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Old 11-20-2010, 03:46 PM   #10 (permalink)
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I follow all the advice and I took the master cyl,front and rear calipers a part also made sure the the brake lines were clear. I think that did it
Now Im looking for a set of tires any input on the shinko tires
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