front brake trouble

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front brake trouble

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front brake trouble - 8/27/2008 8:45:56 PM

LIM118469

Posts: 58
Joined: 10/23/2007
Status: offline

08, cbr1000rr laid it down on the left side, but didn''t put a scratch on the front braking system (master cylinder, calipers, lines r not leaking, pads have a gud amount of material still, & no visible leaks) i have tried to bleed the crap out of the front brakes and still it hasn''t got any better. after i bleed them it will gain soild pressure, but when i roll the bike a few feet and grap the brakes again i have no pressure on the 1st pull, maybe half pressure on the 2nd squeeze, and like full pressure on the 3rd squeeze of the lever. then i roll it a few more feet and it starts all over again with no pressure. has any mone else experienced this or have any ideas as to what else i could try?

Post #: 1

RE: front brake trouble - 8/27/2008 9:17:49 PM

thrasher572

Posts: 430
Joined: 1/5/2008
From: Alberta,Canada.
Status: offline

Sounds like you have a big bubble in the line somewhere. Are you putting a hose on the bleeder or just letting it squirt? Put a hose on the bleeder and watch for bubbles. I always use a clear bottle to drain the fluid into.

(in reply to LIM118469)

Post #: 2

RE: front brake trouble - 8/27/2008 9:50:29 PM

justasquid

Posts: 638
Joined: 4/21/2008
Status: offline

Guaranteed bent front rotor. When the rotor goes through the caliper at the bent point, it pushes the pads away from the rest of the rotor. you grab a handful of brake and it takes that extra travel to close the pads close to the rotor again.

The pads do not travel very far so even a rotor that is bent even as little as a non visivle .020" will cause all sorts of problems. Pull the rotors and have them checked.

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(in reply to thrasher572)

Post #: 3

RE: front brake trouble - 8/27/2008 9:58:04 PM

RojerLockless

Posts: 1983
Joined: 7/19/2005
From: Houston TEXAS
Status: offline

id get someone to take a look at that, and try to not crash your bike too ;)

_____________________________

2008 1000RR 2005 Honda F4i
The only thing I''''''''''''''''m scared of when a Harley is near is that a piece is going to fall off and cause me to wreck.

(in reply to justasquid)

Post #: 4

RE: front brake trouble - 8/28/2008 1:15:47 AM

LIM118469

Posts: 58
Joined: 10/23/2007
Status: offline

naw i''ve just been letting it squirt out. i try to take off the rotors and check them 2moro and c if that helps. haha n yea didn''t really plan to lay it down but 2 late now, thanks guys

(in reply to RojerLockless)

Post #: 5

RE: front brake trouble - 8/28/2008 8:31:50 AM

RojerLockless

Posts: 1983
Joined: 7/19/2005
From: Houston TEXAS
Status: offline

hehe I ment while you are working on the front breaks not working =P

seeing if the rotor is bent is really easy, if you have a front stand just put it on and spin it. if you dont, get a friend to sit on your bike and just walk forward with it, stand in front of the bike and look at the rotors at the bike is coming towards you, if they are not 100% thats your problem

_____________________________

2008 1000RR 2005 Honda F4i
The only thing I''''''''''''''''m scared of when a Harley is near is that a piece is going to fall off and cause me to wreck.

(in reply to LIM118469)

Post #: 6

RE: front brake trouble - 8/28/2008 5:37:57 PM

TBagr

Posts: 212
Joined: 4/9/2007
From: tampa, fl
Status: offline

i had the same problem when i wrecked my 06. it is a bent rotor. as you are riding VERY SLOWLY, look down at them one at a time. you will see the wobble in which ever one is bemt so you dont have to take them both off.

(in reply to RojerLockless)

Post #: 7

RE: front brake trouble - 8/29/2008 10:26:22 AM

LIM118469

Posts: 58
Joined: 10/23/2007
Status: offline

yea i check the rotors with a dial-indicator and yep the right one is bent, so i''m gonna order a new set. thanks guys

(in reply to TBagr)

Post #: 8

RE: front brake trouble - 10/2/2008 12:47:27 PM

trw450r

Posts: 2
Joined: 4/20/2006
Status: online

I just got into track days, and bought an extra set of rims (with rotors) for my 08 1000rr. I put the new rims and brakes on using the same brake pads (stock). I also noticed the brakes seemed like there was an air bubble, but after putting on stainless brake lines and changing all the fluids, the "air bubble" was still there and after reading this post I think it has to do with the rotors/pads. Do you think the problem could be with me using the same pads for both sets of wheels/rotors? Should I be switching out the pads each time? I have not put the other set of wheels on again to see if I still have the inconsistent braking with the original rotors.

(in reply to LIM118469)

Post #: 9