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rear brake
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Parkin lot pimpin'
 
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rear brake - April 7, 2009, 03:44 PM

Ok, so i know a lot of people who ride are not a big fan of using their rear brake but I don't want to get into that discussion because personally I like using mine.

Recently I have been feeling like my rear brake has been getting less bite when I use it. The fluid level looks fine, the brake lines don't look bad, there is more than enough life left on the pads, so i've kinda exhausted my limited experience with diagnosing the problem. I have seen when I push down on the rear pedal it doesn't look like the calipers are moving at all to clamp in. Any ideas?


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April 7, 2009, 03:48 PM

bleed them, you probably have air in there
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April 7, 2009, 03:49 PM

Quote:
Originally Posted by pbrownw View Post
bleed them, you probably have air in there
+1


has the rear been changed since you've had it?


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April 7, 2009, 04:28 PM

how old is the brake fluid in there?


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April 7, 2009, 05:01 PM

You say that the caliper does not look like it is moving the pads in all the way? Then moisture or air is not the problem. Air would not be introduced unless you binned it or tipped over. Even so, compressing air will still move your caliper. Maybe not enough to stop you, but enough to move the pads when you are looking at them. Moisture will compress just like brake fluid UNTIL it boils off in a hot caliper. Then, braking fades.
If you prop the bike on a stand and hit the brake, can you still move the wheel? Or, does it just not feel as good when you are stopping on the street? I ask, because if you answer yes to #1 it is most likely a mechanical issue, or maybe a master cyl. issue. A yes to #2 would indicate moisture in your fluid. Although, a MC problem could still be it.
Bottom line: if it will bite hard on a rear stand, but not on the street; bleed them. Can't hurt.


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April 8, 2009, 09:27 AM

I haven't changed the brake fluid since I got it in August and who knows when it was done before that so I'll try bleeding them first and changing out the brake fluid. lets hope thats all the problem. I've seen how expensive it is to replace some of the seals and stuff in the rear brake and I don't want to bother with that.


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April 8, 2009, 09:39 AM

Quote:
Originally Posted by EndoSJ3 View Post
I haven't changed the brake fluid since I got it in August and who knows when it was done before that so I'll try bleeding them first and changing out the brake fluid. lets hope thats all the problem. I've seen how expensive it is to replace some of the seals and stuff in the rear brake and I don't want to bother with that.
How many miles on the bike?
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April 8, 2009, 10:33 AM

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How many miles on the bike?
just under 9,000


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noise
 
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April 8, 2009, 11:28 AM

Possibly too, rear pads glazed? How does the rear disc look? grooved at all?

Just throwing out stuff...


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April 8, 2009, 11:53 AM

True on the glazing. But, 300 grit will take care of it if it is light.


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April 8, 2009, 12:34 PM

The rotor looks ok but might be a tad grooved. I haven't taken off the caliper so i'm not quite sure on how the pads look. I'll worry about that once I actually get some time to throw it up on a stand and take my time. I'm not riding too much right now (no M class) so its not dangerous or anything. I should be getting my M this weekend so hopefully next weekend I'll be able to take all day playing with stuff.


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April 25, 2009, 10:33 PM

how can i tell my pad levels on the front and rear calipers?? trying to figure out if i need new ones..
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