Dirt bike fell, and lose brake pressure

[Finesse77]

So went to carnegie today. While i was gearing up, bike fell down on the right side. Broke broke the brake lever, and lose brake pressure. As in, no brakes at all. It’s a 04 KX125
I tried to bleed the brake system, but i just can’t get a pressure.
Do you guys think, brake master cylinder is the issue?
Please help.... thank you

 

[C8H18]

Ziptie the (replacement?) brake lever to the bar overnight. Then tomorrow morning, tap on the calipers with a wrench or something, wiggle the lines. Then undo the ziptie. Then proceed to bleed.

Still not working? Reverse bleed it with a syringe (go to walgreen pharmacy and get a big syringe and tubing that fits over the bleeder screw. check youtube for a tutorial.)

Did you replace the lever? Is the lever fitting properly, IE letting the MC open and close?

 

[Finesse77]

Ziptie the (replacement?) brake lever to the bar overnight. Then tomorrow morning, tap on the calipers with a wrench or something, wiggle the lines. Then undo the ziptie. Then proceed to bleed.

Still not working? Reverse bleed it with a syringe (go to walgreen pharmacy and get a big syringe and tubing that fits over the bleeder screw. check youtube for a tutorial.)

Did you replace the lever? Is the lever fitting properly, IE letting the MC open and close?

Thanks, i’ll zip tie the new brake lever now. Yes, the brake lever i replaced is the right fitting.
Thanks again

 

[ScottRNelson]

When I had motocross bikes and was a regular at Carnegie, I had a whole bag full of broken clutch and brake levers. Sometimes when we broke one, I could find another broken one that wasn't quite as bad that we could use to continue the ride, then I would get a new one after I got home.

Right now is when you should be thinking about installing Bark Busters or Cycra hand guards. It's pretty hard to break a lever with those on the bars.

One other thing that has worked for me when there is air in the lines is to push the brake pads back in as far as they will go. This forces air back up the other way and out. Then you just pump the lever to get pressure again.

 

[mototireguy]

Probably just some big air pockets in brake master or brake line.

Vacuum bleeder to suck/pull fluid thru the system.

If no fancy equipment available can use plastic tubing and mouth to generate vacuum, keep eyes on tubing for fluid beginning to come out, don't swallow.

 

[motorider365]

The fall either cracked something or jiggled an already existing bubble loose causing squishy brakes. Let us know what you find out.

 

[madsen203]

If you want to fix it today: Keep pumping the brake lever while opening and closing the bleeder valve. I used to have this problem on my clutch (before rebuilding it with new plunger seal). It will feel like you're doing nothing for a good few minutes but then it'll start to catch and push fluid/air out.

Leave partly pulled with zip tie as other mentioned over night whether you do the above now or later. It'll allow bubbles to rise.

When topping off the fluid..I like to overfill it and let it seep out when I install cover so virtually no air will remain and prevent this problem from occurring again.