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Brake Lever Soft
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Brake Lever Soft - May 5, 2013, 05:02 PM

CRF250R Front brake lever fairly soft and squishy....

Bled the brakes, helped a little but not much. Rebuilt the Master Cylinder today in hopes that it was going, well that might have helped a teeny bit, but they definitely feel pretty soft compared to my other bikes. Could it be the caliper? or maybe the lines? I have new pads on so it's not travel or anything. The bike stops fine, I just would like a firmer lever feel.

Update: Everthing in the pic was replaced (piston, two seals, C-Clip, washer, spring and boot)



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Last edited by djkouza; May 5, 2013 at 05:54 PM..
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May 5, 2013, 05:13 PM

I know of the "worlds best mechanic but I can not recommended him as I am just a lachey!" Bleed them again but push fluild from the bottom up with a syringe instead.
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May 5, 2013, 05:24 PM

Quote:
Originally Posted by djkouza View Post
CRF250R Front brake lever fairly soft and squishy....

Bled the brakes, helped a little but not much. Rebuilt the Master Cylinder today in hopes that it was going, well that might have helped a teeny bit, but they definitely feel pretty soft compared to my other bikes. Could it be the caliper? or maybe the lines? I have new pads on so it's not travel or anything. The bike stops fine, I just would like a firmer lever feel.
Did u replace the rubber Diaphragm?

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May 5, 2013, 05:56 PM

Quote:
Originally Posted by drt_Jumper View Post
I know of the "worlds best mechanic but I can not recommended him as I am just a lachey!" Bleed them again but push fluild from the bottom up with a syringe instead.
I'll have to get a syringe and try that, any reason why that would work better than standard bleeding?

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Did u replace the rubber Diaphragm?
Updated OP with picture, basically I replaced all the pieces in the pic. (note pic is the original pieces) I made sure the seals were facing the same direction as the ones that came out too.


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May 5, 2013, 06:07 PM

Perhaps you still have an air bubble in the lines. That could result in the spongy feel pretty easily.

Pushing from the bottom up means you might push the bubble up and out from the caliper. I had this issue literally yesterday on my rear brake for my 300. I ended up flushing the lines completely, then running through most of a bottle of brake fluid. I got a ton if gunk out and once the fluid cleared up nicely I went through crack bleeding it and it firmed right up.

Can you see any sections where air might catch? Line them up and tap everything with a screwdriver handle. Try to dislodge any possible air bubbles. Just a thought. You've done much more than I ever have for problem brake lines.

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May 5, 2013, 06:50 PM

Also try creaking open the banjo bolts while pump bleeding. Sometimes air gets trapped right in that union area.


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May 5, 2013, 06:51 PM

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Also try creaking open the banjo bolts while pump bleeding. Sometimes air gets trapped right in that union area.
Cracking dammit cracking.


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May 5, 2013, 07:30 PM

Brakes are the simplest system on a bike. If they're squishy,it's air in the lines.


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May 5, 2013, 08:23 PM

Also check the banjo bolt for cracks. I had that issuue before from galfer

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May 6, 2013, 05:24 AM

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Brakes are the simplest system on a bike. If they're squishy,it's air in the lines.
Not necessarily. Could be worn out/contaminated fluid, worn out lines or even a master cylinder poorly matched to the caliper, etc. The generation of KX250 I've got is known to have a lousy master cylinder. It's on my to do list to replace it but I don't really need more braking power at the moment. I actually prefer brakes that are not excessively sensitive. I'll probably replace it before I do the budds thing though.
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May 6, 2013, 05:57 AM

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Not necessarily. Could be worn out/contaminated fluid, worn out lines or even a master cylinder poorly matched to the caliper, etc. The generation of KX250 I've got is known to have a lousy master cylinder. It's on my to do list to replace it but I don't really need more braking power at the moment. I actually prefer brakes that are not excessively sensitive. I'll probably replace it before I do the budds thing though.
Once you go to Brembos and 1 finger braking with little effort you won't settle for anything else. I was like you before. But the ability to get massive braking without having to use both hands and 1 foot on the front brakes is well worth it.


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May 6, 2013, 06:24 AM

Part of my issue may be hands that go "dead" so there's no sensory feedback. I can't tell if I'm squeezing hard or not. Since the surgery last year my right hand doesn't go dead any more so maybe I could handle a more sensitive front brake. For the rear of the KX I actually put a monster spring to keep me from overdoing it as I have a tendency to lock up the rear unintentionally.
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May 6, 2013, 06:55 AM

Quote:
Originally Posted by KirkRoy View Post
Part of my issue may be hands that go "dead" so there's no sensory feedback. I can't tell if I'm squeezing hard or not. Since the surgery last year my right hand doesn't go dead any more so maybe I could handle a more sensitive front brake. For the rear of the KX I actually put a monster spring to keep me from overdoing it as I have a tendency to lock up the rear unintentionally.
And here I would adjust the lever to come on a bit lower. Of course I have a cheat with the autoclutch on my dirtbike. So YMMV.



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May 6, 2013, 07:04 AM

In the dictionary next to ham-fisted is a picture of me. This applies to my feet as well. I've adjusted the rear brake down before too but thought I'd try the spring trick this time. I've still got to get used to it/decide if I want to keep it this way.
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May 6, 2013, 08:08 AM

I have done all those extra above said, come to find out the front rotor was mess up on the 04 gsxr 600. Smh what a waste of my time.


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