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Old 10-17-2009, 04:55 PM   #1
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Need advice.. I can't get my back brakes to work

This was my fist attempt on my bike... I put new brake pads on the back, I bled the line... but every time I step on my back brake it doesn't work... I tried bleedling them several times, made sure I put the brake pads on properly ( they are ) but still, my back brakes aren't working... any advice is appreciated.... and yes, I made sure I still have enough brake fluid in there....
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Old 10-17-2009, 04:59 PM   #2
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Is the pedal hard at all or soft?
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Old 10-17-2009, 05:00 PM   #3
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When you bleed the brakes is any fluid coming out of the brake caliper?
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Old 10-17-2009, 05:02 PM   #4
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It was coming out of the caliper not anymore... I adjusted it right and tightened it, and yeah, the pedal is super soft
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Old 10-17-2009, 05:07 PM   #5
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Ok. Maybe this is it. When you are bleeding the brake you need to

(1) apply slight pressure to the brake lever
(2) loosen the bleeder screw while keeping pressure on the lever. As you loosen the bleeder, you'll push the lever down and fluid will come out.
(3) retighten the bleeder screw before the letting the lever back up. Ideally, I tighten the bleeder before the lever gets to the end of it's travel.

You'll need to repeat this many times to get the air out. Also, tap on the lines, caliper, and fittings to dislodge any air bubbles that might be stuck.

If you have a bleeder on your master cylinder, bleed it there too. I bleed the master last. Be sure to keep the reservoir filled with fluid to the appropriate level as it's marked.

-Curt

Last edited by maxgs; 10-17-2009 at 05:10 PM.
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Old 10-17-2009, 05:08 PM   #6
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the master cyl is probably bad... did you use DOT 4 when you re filled, and our you holding the brake down when you bleed them (turn the bleed valve counter clockwise and keep the brake pedal depressed until you tighten the valve again.) just some questions you said it was your first and that system is very basic if you have bleed them correctly and there is no air in you system, check for leaks if not you have a bad seal somewnere in the system... probably the master...
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Old 10-17-2009, 05:10 PM   #7
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^^^bingo(Maxgs)

If that doesnt work, run a hose from the bleeder into a container; submerge the end of the hose in brake fluid.

Take the cap off the reservoir, crack the bleeder just a little and begin to pump the brakes. Add to the reservoir as needed.

this method you do not need to close and open the bleeder; what it will do is allow fluid to go back through the hose when you release the brake pedal. Keep pumping and eventually the reservoir fluid will drop significantly.

If there is a bend in the hose to the master from the reservoir, move the bike or loosed the reservoir to try to get out any air that may be stuck in there.


Gonna PM u my number; Im leaving to go meet some friends but I can be reached via BB or text.
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Old 10-17-2009, 05:11 PM   #8
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Let me try it again... haven't rode it in awhile, im sure it may be the master....if that's the case... ill take it to the shop, thanks everyone
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Old 10-17-2009, 05:11 PM   #9
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If the brakes were working before he changed the fluid, it's unlikely that a seal just went bad. I suspect it's a combination of bleeding technique and air in the lines.
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Old 10-17-2009, 05:13 PM   #10
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so did anyone ever tell you that you dont have to bleed your brakes when you change pads.....
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Old 10-17-2009, 05:15 PM   #11
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hahahaha
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Old 10-17-2009, 05:30 PM   #12
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yea i didnt get that eather and why would you have flued come out of the caliper ?

good luck !
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Old 10-18-2009, 08:43 AM   #13
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Bleed at the master first. Pump pump pump hold and then crack the banjo bolt on the master cylinder. Wet a rag and catch the fluid. Repeat this a few times.Then move to the caliper to bleed there.
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Old 10-18-2009, 08:46 AM   #14
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Hey BlueWave.... When I do new lines or a new master, I do master-calipers-master, or if I completely screw up the bleed and the master isn't primed. Subsequent bleeds, I do calipers then master.

Do you do something similar or are do you always go master and then calipers?

-Curt
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Old 10-18-2009, 11:45 AM   #15
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Learned that procedure from Sunny very recently. It makes sense to do the master first on mine. The master is lower then the caliper. His may not be and I should have mentioned that.
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Old 10-18-2009, 12:00 PM   #16
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ok guys, tried it, seems i need a new master....... thanks for the advice, i was able to install a new clutch cable and new brake pads on the front, works great, i rode it a bit around the neighborhood, but yeah, i wont be riding it anymore till i get the new master installed, thanks for the help
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Old 10-18-2009, 12:07 PM   #17
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I doubt you need a new master
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Old 10-18-2009, 01:15 PM   #18
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Quote:
Originally Posted by bluewave18 View Post
I doubt you need a new master
I agree...bleeding the brakes on the bike is alot more tricky than on a car..found that out the hard way but i eventually got it done...take it to a shop or have someone come over and do it for u..
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Old 10-18-2009, 01:17 PM   #19
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Quote:
Originally Posted by BYRDMAN View Post
I agree...bleeding the brakes on the bike is alot more tricky than on a car..found that out the hard way but i eventually got it done...take it to a shop or have someone come over and do it for u..
+1 let some one who knows what there doin work on it
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Old 10-18-2009, 02:03 PM   #20
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Quote:
Originally Posted by Jay View Post
ok guys, tried it, seems i need a new master....... thanks for the advice, i was able to install a new clutch cable and new brake pads on the front, works great, i rode it a bit around the neighborhood, but yeah, i wont be riding it anymore till i get the new master installed, thanks for the help
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