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Old 09-28-2016, 01:41 AM   #1
Hound_Squad
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Brake Issues

So for some odd reason my brakes are acting funny, like there is a constant pressure on the rotor. It wasn't happening about two weeks ago. I threw it up on stands and when I try to turn the wheel its restricted by the brakes, does that mean I need to bleed the brakes?
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Old 09-28-2016, 02:17 AM   #2
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Also I noticed when I was changing my brake pads that during the process when I would pump the brake that the pistons wouldn't acuate at the same time..? Is that normal.
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Old 09-28-2016, 08:12 AM   #3
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It could be several things. Difficult to diagnose over the Internet but...
It could be the pistons are sticking in the calipers. That could be caused by an accumulation of dirt or possibly corrosion inside.
Try removing the calipers without disconnecting the lines and cleaning them thoroughly.
Has the brake fluid ever been changed?
Does the sticking problem get worse when they are hot?
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Old 09-28-2016, 09:21 AM   #4
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I Think a lot of folks fail to clean the pistons and slide pins when doing a brake job. Something so simple that can cause so much grief.
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Old 09-28-2016, 11:20 AM   #5
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Did you recently put on aftermarket levers?
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Old 09-28-2016, 01:12 PM   #6
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when i got the bike there was already aftermarket levers, and when they get hot it seems like normal. when i changed the pads i thought i cleaned them thoroughly but i will redo that, and I'm not sure if the fluid has ever been changed but it looks slightly over filled and a little discolored
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Old 09-28-2016, 01:52 PM   #7
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If it's discolored at the master cylinder it's garbage at the caliper.
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Old 09-28-2016, 01:53 PM   #8
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Quote:
Originally Posted by Hound_Squad View Post
when i got the bike there was already aftermarket levers, and when they get hot it seems like normal. when i changed the pads i thought i cleaned them thoroughly but i will redo that, and I'm not sure if the fluid has ever been changed but it looks slightly over filled and a little discolored
Anytime you change brakes you should go ahead and change the brake fluid. Brake fluid is so cheap especially for a bike.
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Old 09-28-2016, 02:03 PM   #9
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Alright! thanks guys!
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Old 09-28-2016, 03:18 PM   #10
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Quote:
Originally Posted by Hound_Squad View Post
Also I noticed when I was changing my brake pads that during the process when I would pump the brake that the pistons wouldn't acuate at the same time..? Is that normal.
Did you push the pistons in without first cleaning them?
Everything you're describing sounds like filthy pistons and seals, causing stiction. It's not likely you will be able to completely resolve this issue without removing the pistons for a good cleaning and a new set of seals.
But you should try removing the calipers and cleaning the pistons/seals, with some brake cleaner and a toothbrush, first.
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Old 09-29-2016, 09:26 AM   #11
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Quote:
Originally Posted by El Pachuco View Post
Did you push the pistons in without first cleaning them?
Everything you're describing sounds like filthy pistons and seals, causing stiction. It's not likely you will be able to completely resolve this issue without removing the pistons for a good cleaning and a new set of seals.
But you should try removing the calipers and cleaning the pistons/seals, with some brake cleaner and a toothbrush, first.
Has to be a sticky piston. Either dirt or an old square cut seal, use the bikes brake system to push the pistons out of the caliper (not pliers) and clean any rubber/dirt off the pistons (use Emory cloth or steel wool grade 0000) and install a new seal kit, bleed correctly and you should be good to go.
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