bleeding brakes on my mortorcycle.?

Question

ok i tried bleeding my rear brake the other day. i got air into the brake cylinder(i think thats what its called) and now i cant seem to get the air out. can anyone help me on how to do this.

Answer 1

tapping lightly on the line with a small wrench or screwdriver can sometimes send those trapped tiny lil bubbles up if you wanna make it really simple there is a tool called a Mity-vac that costs about 40 bucks and even my wife can bleed em with one of those

Answer 2

OK - here goes!
Step 1.
Get your self 2 feet of plastic hose that will fit over the bleeder nipple tightly and put it on the nipple. (May have to warm the end so it fits over the nipple tightly) Get sombody to give you help by pumping up the brakes while you bleed them.
Step 2.
Half fill an empty pop bottle with brake fluid and insert the other end of the plastic hose in the bottle ensuringthat the end is well down in the fluid, otherwise you're going to suck air into the system again. ENSURE that the master cylinder is full at all times or you will get more air into the system.
Step3.
Have your assistant pump up the brake about 6 times, then hold the pressure on. You then release the nipple and you will notice air bubbles in the bottle. Your mate MUST keep the pressure on the brake as the system is being bled until you close the nipple, then he can release the brake. This will stop air/contaminated fluid going back into the system.
Step 4.
Check the master cylinder again. Repeat step 3 until there are no more air bubbles showing in the fluid in the pop bottle when you bleed the brake. When you are sure there is no more air in the system (no bubbles in the bottle), give it one more shot for good luck! Make sure that the nipple is done up tight (DON'T break it!!!)
then remove the plastic hose.
Theory says that that should do it, but if you find that you start to loose the brake again, I would suspect a problem with the brake cylinder.
Good luck with it and DON'T BREAK THE DAMN NIPPLE!, gently tighten it. Email me how you go, yeah

Answer 3

You must have released the brake before you closed the line. All you have to do is keep adding fluid to the reservoir and close the bleeder before the fluid is pumped down all the way when you depress the brake. This might take a few times but it will eventually get all the air out. Another set of hands might come in use full when you try this again.

Answer 4

Well details are lacking here for a real good answer. But if you are doing it by yourself I suggest Gravity bleeding it.
Fill master cylinder full with clean brake fluid, lossen ( rear in your case right) brake bleeder valve. Let the brake fluid drip out of the bleeder mind you to keep the master resovouir full. I imagine after you top off the fluid in the master about three times ( do not let it empty all the way) you will have 90% of the air from the system.
That is of course barring a leak in the hydraulic system.

Answer 5

Fill the fluid reservoir.Close it.Find the bleeder on the caliper.It looks like a nipple you can put a wrench on.Close it.Pump brake pedal a few times,have someone keep pressure on it Open bleeder [nipple]a little .Air /fluid may come out .Close bleeder WITHOUT letting pedal come back up.Now pump pedal,repeat.If you still get air after the third try,fill the reservoir back up,try again.When you get nothing but fluid,your done.Keep this stuff off your brake pads,clean it up good,and look for the leak after you ride a little.Make sure to use correct fluid,DOT3/DOT5 don't mix well and will turn caustic[drain and flush with rubbing alcohol and let dry if youv'e mixed 'em]

Answer 6

Mad_mick001 has it exactly right. Just remember, bubbles rise, so if you're too slow bleeding them, the bubbles will rise further up the brake lines, and it'll take more to get them back to the bottom again. So, even if no air comes out the first couple of times you open the bleed nipple, keep going - and remember to keep the reservoir full, or you'll have to start over from the beginning.

Answer 7

I bleed brakes and clutch with a MityVac. Pull a vacuum on the line, open the bleeder and keep fluid in the master cylinder.
Once you've bled the line, close the bleeder and tap GENTLY on the caliper with a small hammer or a wrench. Pull a vacuum and crack the bleeder again.

Answer 8

You have to bleed the brake line while its SUBMERGED.

Get someone to help you:

Put some brake fluid into a container thats big enough to fit your hand in.
Submerge the bleeder and then open it.
DONT let it come out of the fluid when its open.
Pump your brakes till you get the bubbles out (it may be black).
While doing this you want someone to refill the reservoir up to because the system is losing fluid.

Close the bleeder and then you can pull it out.


WEAR GLOVES. Make sure it doesnt get on your hand. It can be corrosive!

Answer 9

upload fluid to the grasp cylinder and enable it sit down for an hour or so. flow to the furthest wheel from the grasp cylinder and open the bleeder screw. Have your assistant press slowly down on the pedal till it reaches the floor. Tighten the bleeder screw and characteristic your assistant slowly launch the pedal till its decrease back up on the right of its holiday. Repeat on comparable wheel till you get fluid from the bleeder. Now repeat technique on next furthest wheel etc till all wheels are turning out to be fluid. do no longer enable THE grasp'S FLUID GET LOW! save checking it and including as mandatory. as quickly as you have drawn fluid from each wheel, initiate over. This time nonetheless your assistant pumps the brake pedal till its good and stiff. on a similar time as the pedals being held open the bleeder screws on each wheel interior the comparable order you probably did earlier. artwork one wheel at a time till you get not greater air, in basic terms a stable flow of fluid. do no longer neglect to maintain checking your fluid point and good luck!