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Old 08-19-2010, 12:21 AM   #1
AYEELE
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Front braking problem

When i apply the front brakes, the steering jerks to the left. so im thinking the left one pulls harder than the right. so i bleed both anyways.. with a tube and a cup or water to check for the air bubbles. so i pumped and let the bubbles in the tube flow.. then the brake fluid comes out later along with little air bubbles. so i did this to the other side also. i was filling the master cylinder as i was pumping. all of this lead to the exact same thing. any suggestions? bike was perfectly fine today until now ?? idk how that happened. but yeah lines are tight, brakes bleed, air bubbles out, and it still yanks to the left.

any help would certainly help
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Old 08-19-2010, 12:29 AM   #2
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Not supposed to pump.. Just let it run out, or pump, hold,crack it open, close, then let off.. pump again.. etc.. When you let off it sucks some fluid back.. would hate to think that you just mixed water in your calipers. I would check every bolt on both forks including the bearings on the tripple to make 100% sure its tight.. I cant imagine that air would cause a pull like that. Seems like the brakes would be just straight mushy..

Also might wanna loosen the whole front again like you took the wheel off and spin it/slam the brakes a few times to make sure everything is perfectly centered.. Only other think I can think is warped rotor, but it happened to me before. Only symptom was having to pump up the brakes a little before I rode.. Never pulled.
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Old 08-19-2010, 12:33 AM   #3
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yeah i pumped then held, tightened, and then pumped agian. but its not working.. so ill try your method tomorrow morning. im going to check rotors also, and take off the wheel, and put it back on.
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Old 08-19-2010, 05:04 AM   #4
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What do your pads look like?
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Old 08-19-2010, 05:11 AM   #5
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Old 08-19-2010, 05:18 AM   #6
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Old 08-19-2010, 07:22 AM   #7
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they sell caliper rebuild kits, fyi.... sounds like its sticking. if you rebuild. rebuild both no matter what.
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Old 08-19-2010, 08:43 AM   #8
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It seems like there would have to be massive amounts of fork flex or loose triples to cause a brake pull on a bike. There's only 1 front wheel... Both rotors are attached to the same wheel, so each rotor (and every other part of the wheel) spins at the same RPM and all. Unless one fork is being bent/deflected by the gripping caliper enough to change the wheel angle, I can't see how it could pull from a brake issue. Lots of bikes only have a caliper/disk on one side and have forks that are less rigid than on a sport bike. Did you have any of the bolts loose on the triples?
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Old 08-19-2010, 08:50 AM   #9
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I went down once on the Kawi, bent a rotor and I had lost brake pressure and it shook. I took off the rotor to ride the next day, pumped the brakes til the caliper completely closed and it rode fine. So somehow dont believe is brake related.
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Old 08-19-2010, 08:53 AM   #10
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I went down once on the Kawi, bent a rotor and I had lost brake pressure and it shook. I took off the rotor to ride the next day, pumped the brakes til the caliper completely closed and it rode fine. So somehow dont believe is brake related.
I'm learning on bikes, but I know a decent amount about cars, but I don't see how it could be brake related either. Its one wheel with two rotors. If you only had brakes on one side it still wouldn't cause it to turn the handlebars. Don't know what else it could be. But I am more than welcome to be enlightened otherwise.
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Old 08-19-2010, 08:58 AM   #11
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Check wheel spacers are in proper place.
Check tire pressure.

Good luck
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Old 08-19-2010, 11:03 AM   #12
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triples are straight and tight. havent got to check anything else yet, but i will asap. checking rotors, pads, unmount/mount the front wheel, spacers, air presure, forks, bearing seals, and calipers.


bike was in a front end wreck along time ago from previous owner, but the bike worked fine for 2 years. now this popped up. you dont think the brakes could jerk to one side like that? rear wheel is only one rotor.. so maybe its not the brakes?
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Old 08-19-2010, 11:12 AM   #13
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Old 08-19-2010, 12:00 PM   #14
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Quote:
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triples are straight and tight. havent got to check anything else yet, but i will asap. checking rotors, pads, unmount/mount the front wheel, spacers, air presure, forks, bearing seals, and calipers.


bike was in a front end wreck along time ago from previous owner, but the bike worked fine for 2 years. now this popped up. you dont think the brakes could jerk to one side like that? rear wheel is only one rotor.. so maybe its not the brakes?
Doubt it.
As previously stated you may have a caliper issue which is why I'd like you to check how the pads look?
Are they evenly worn?
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Old 08-19-2010, 12:08 PM   #15
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Doubt it.
As previously stated you may have a caliper issue which is why I'd like you to check how the pads look?
Are they evenly worn?
just checked, nope both even with plenty left. rotors arent warped either
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Old 08-19-2010, 12:30 PM   #16
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just checked, nope both even with plenty left. rotors arent warped either
Swing it up and I'll look at it, no charge.
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