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Old 12-18-2011, 10:49 AM   #1
randomwalk101
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Loosing of braking power

Hi all

I parked my bike over last six months and just recently pulled it out to ride again. This is an 08 ninja 250. However, the bike seems like it lost about 50% of it's braking power on front (rear is still the same). I check front fluid and it's still full. What could be the issue?
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Old 12-18-2011, 10:56 AM   #2
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Initially there is rust on the rotors, I would bet its your loss Of touch vs actually brake loss
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Old 12-18-2011, 11:02 AM   #3
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Clean the rotors and flush and bleed the brakes.
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Old 12-18-2011, 11:03 AM   #4
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I park the bike inside the house in one of the spare room. There is no rust on rotor. Def brake prob, not imagination. Normally you can stop on the dim with these bike. Now, pull the brake and the bike "glides" to a stop.

My 600rr stops just fine like before.
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Old 12-18-2011, 11:04 AM   #5
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Thanks Patrick. Will bleed the brake today.
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Old 12-18-2011, 11:06 AM   #6
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Quote:
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Clean the rotors and flush and bleed the brakes.
Should fix your issue
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Old 12-18-2011, 11:57 AM   #7
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Loosing? Ohh, LOSING.

Yeah, what Patrick said.
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Old 12-18-2011, 11:59 AM   #8
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Have you tried pumping the brakes? Could just be a loss of pressure. Compress the brakes and suck a zip tie on it over night. If that fails bleed the brakes.
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Old 12-20-2011, 10:58 AM   #9
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I bled the brake but still like the bike's brake is weak. Now I haven't touched the bike for 6 months and just recently rode it to the new house so I couldn't remember exactly if this is the way it is or something is wrong with it...especially didn't help since I rode it over right after riding the 600rr over (which the brake is crazy strong in comparison).
Anyone with a new generation ninja 250 can give me some feedback? I'm about to swap out the master cylinder & front caliper but dont' want to go to that extreme if this is the way it is supposed to be (fixing for nothing). Thanks all.
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Old 12-20-2011, 11:36 AM   #10
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so your SURE you got all the air out of the lines
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Old 12-20-2011, 11:40 AM   #11
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I think so. I bled until no more bubble cAme out and bled some more...all solid brake fluid. Went through about 5 reservoir of brake fluid.
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Old 12-20-2011, 12:03 PM   #12
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Try new brake lines before changing the MC and caliper. Maybe just get a caliper rebuild kit.
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Old 12-20-2011, 12:16 PM   #13
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Quote:
Originally Posted by AngusTEx View Post
Loosing? Ohh, LOSING.

Yeah, what Patrick said.
i was wondering what loosing was.
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Old 12-20-2011, 12:21 PM   #14
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Quote:
Originally Posted by Chuckster View Post
Try new brake lines before changing the MC and caliper. Maybe just get a caliper rebuild kit.
I have galfer stainless line and both ends are dry.
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Old 12-22-2011, 08:40 PM   #15
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I flushed and bled the front brake but it's the same. Could one of the caliper stick? If so how do I fix it? Thanks all.
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Old 12-24-2011, 08:13 PM   #16
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I pulled the caliper and one of the piston is stuck (it only extends half way compared to the other one). Anyone knows how to fix this? I took it off the bike already.
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Old 12-24-2011, 08:15 PM   #17
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grab hold of it with some pliers and work it.
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