I had to replace the rear brake pads today on my son's 250 Sport. I've replaced them before with no problem and did nothing different this time.

I used a c-clamp to press the caliper piston back into the caliper SLOWLY, and repaced the pads. After mounting the caliper back up I now have no rear brakes. The pedal goes all the way down. I have tried to bleed them several times and still have no brakes. I know I should not have to bleed them when replacing pads but I've run out of ideas as to what happened.

Any ideas as to what's wrong...anyone?[img]i/expressions/face-icon-small-confused.gif[/img]

 

Do you get a spray of fluid when you bleed?

 

No I didn't. I've finally got it working again though. Apparently there was some air SOMEWHERE in the line. I bled the crap out of it and the caliper is now clamping the rotor. I must have refilled the brake fluid 5-6 times, but it is working.

How any air would have got into the system is a mystery to me.

 

There was most likely some air in the lines in a place it didnt matter.. pushing the caliper in moved the air to a spot in the system that affected it.

It takes approx 6-8 fillings of the resevoir to flush the whole system.

I use as mighty vac brake pump to pull the fluid thru the system from the top.

 

Glad to hear it's working again! I have had a little issues with the Front Brakes with the Red 250, sometimes you have to pump the lever a couple times to get it to pump up. I have bled it a couple times also so perhaps I still have air in there to!

 

<div class="FTQUOTE"><begin quote>...sometimes you have to pump the lever a couple times to get it to pump up.</end quote></div>
Hummm. Dude, I'd seriously suggest a complete bleed job. Unless your reflexes are way better than most old dudes; otherwise, you gonna be eating tree bark for a last supper.

 

<div class="FTQUOTE"><begin quote>Originally posted by: outofline

Glad to hear it's working again! I have had a little issues with the Front Brakes with the Red 250, sometimes you have to pump the lever a couple times to get it to pump up. I have bled it a couple times also so perhaps I still have air in there to!</end quote></div>

Funny you should mention the front brakes. I was going to replace the front pads too, and when I removed the one front caliper I found the inner pad was TOTALLY gone. The caliper piston had been contacting the rotor, and is pretty ate up. It never made any noise to warn me or my son that it had fallen out. He did mention last weekend while we were out riding that the front brake lever suddenly went clear down against the handlebar grip, but worked "fine" after that.

I'm hoping that I can remove the piston and have a machinest at work machine it down so it is flat again. He might need to remove around .125" to do that. If it won't work I'll have to buy a new caliper.

BTW, the front pads are the same as the rears except that the outer front pad has a radius on the bottom to clear the front hub. I found a set of EBS pads that are a direct fit for the rear, and will get the same machinest to put the radius on the outer front pads. The EBS pads aren't cheap...$28 a set. I need 3 sets, so do the math! Not cheap, but they have lasted alot longer than the factory pads.