I own an 06 883C Sportster. On the weekend I replaced rear brake pads which is all fine. Then, putting in new brake fluid, and tried to bleed the rear brakes.....we were almost there, when the last pump of the pedal forced a 'gush' of brake fluid out the top of the Brake Master Cylinder (ie: in the wrong direction!!!).

The rear brakes now won't bleed at all (after several hours of attempt). There is no fluid coming from the bleed valve at all, and each time I pump the rear brake, the is either a bubble or movement of fluid in the Brake Master Cylinder.

Has anyone heard of this happening before. Has a plunger in the brake line been force 'inside out'? Need help, have no back brakes!!!!

 

did you get this fixed? I'm having the same problem with my 96 electraglide...no back brakes

 

Do you have a hard pedal or a soft pedal when this stuff "jumps" up out of the MC reservoir? It's normal to get a squirt of fluid up through the center of the reservoir if the brake pedal is hard and you may get some small air bubbles along the way. If you have a soft pedal and it's air bubbles...you're simply not bled yet.

If you have a hard pedal...loosen the banjo connection at the caliper and see if the fluid is getting that far. If you have a hard pedal and no action of fluid at the bleed nipple....something is stopped up.

Sometimes brakes can be hard to bleed and one of those hand-pumps you can get down at the parts house can come in handy. If you are not afraid of it...try this. No...I am not asking you to "drink" any fluid, but you can attach a section of clear plastic line to the bleed-nipple and suck (as in a straw) through the nipple to see if you have air, fluid or a complete vacuum at that point.

 

I have a mity vac. It works great for bleeding. I use it on all my cars and bikes. Makes a two man job, a one man job.

 

Sounds like you got a blockage in the line, between reservoir and the caliper. I would remove the banjo from the caliper. Check flow. It you have no blockage you may have one in the caliper. Which you'll need to remove the caliper and check. Probably by tearing it down.

Im having the same problem, so ill let you know how it turns out for me.