Ive tried to bleed the rear brake on an italjet dragster 125 but it will not bleed..whats the best way to bleed and how would i know which part of the system is at fault if i cannot get pressure at the lever
2007-01-31 05:22:41 · 10 answers · asked by pyp5y 1 in Cars & Transportation ➔ Motorcycles
You should check the seals inside the caleper. If the are torn then u won't get any preasure. It is also beter to bleed your system from the caleper to the resavour, but u will need a preasure hose for that
2007-01-31 05:30:48 · answer #1 · answered by skip_tiny 1 · 0⤊ 0⤋
You've still got air bubbles in the brake line. Try taking the cover off the master cylinder and thump the brake line with your finger, starting at the caliper and working your way up. Hopefully this will break some loose, then you can pump up the brakes 10-15 times to see if bubbles pass through the top. Re-install the cover on the master cylinder and bleed the brakes through the caliper again, pumping them up first and holding them while opening the bleed port. It's also possible that you've got a leak somewhere, but I'm assuming that you would have spotted that. It's also possible that you need to replace the rubber seal on the plunger in the master cylinder, since your bike is a 1981 and the master cylinder may need to be rebuilt. If you decide to rebuild the master cylinder, check the inside of bore where the plunger for pits or corrosion, and replace the master cylinder if you find any. DO NOT ATTEMPT to hone the bore. DOT 3 brake fluid has a tendency to attract water, especially if the brakes have gotten hot, when condensation can form. If the fluid in your master cylinder does not look exactly like new brake fluid, flush out the old fluid by draining it, refilling and draining again. Any time you bleed your brakes, be sure to check the fluid level in the master cylinder when you're done.
2016-03-28 22:28:22 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Have you replaced a part in the brake system lately?
The reason I ask, is once a customer brought in a bike he had dumped, and he replaced the broken front brake lever on the handle bar. We couldn't get the system to bleed. What had happened, he installed the screw that adjust the free play on the lever backwards, and it wouldn't allow the master cylinder piston to return far enough.
If not:
Pump the brake, then hold it down while someone opens the bleeder valve, (put a piece of clear gas hose on valve, through a lid screwed onto a bottle with some brake fluid in it) then shut valve, release brake, repeat.
Another method is to get a squirt oil can that has a trigger, and a spout. Put a piece of clear gas line connecting spout to bleeder valve, pump the trigger to build pressure (with valve open), and pump brake as oil can is pumped. Close valve, when all air is bled, then try bleeding traditional method (see above).
2007-01-31 06:01:26 · answer #3 · answered by strech 7 · 0⤊ 0⤋
You problem my be air ... Make sure the reservoir is full . Then seal it up . Squeeze the handle several times the last time hold it . Have someone open the bleeder valve till liquid comes out . Close it quickly . Repeat as many times as needed until there is pressure at the level .. When this happens the air is gone and you have all fluid in the line ...
2007-01-31 08:02:35 · answer #4 · answered by Anonymous · 0⤊ 0⤋
--First check that your master cylinder is working.
--Remove the brake hose from the master cyl. Block the hole with your finger and pump the brake. The pressure should push your finger off. If not, rebuild the master cyl (first make sure the master cyl is filled).
--Put the brake line back on.
--Remove the brake hose from the brake caliper.
--With your thumb and finger, block the opening of the hose. Bleed the brake with your fingers. Pump-hold-release & close the hose to let air out. Keep repeating until no air comes out.
--Quickly re-attach the hose (to keep air from getting back in the hose).
--Bleed the brake using that bolt (not the nipple) until air is out.
--Bleed normaly with the nipple.
2007-01-31 07:46:12 · answer #5 · answered by guardrailjim 7 · 2⤊ 0⤋
pump the lever then hold it down,then release bleed nipple untill allthe air comes out.you may have to do this a few times remembering to tighten the nipple each time holding the lever down. pump again untill brake fluid comes out and pressure is ok.
2007-01-31 06:43:15 · answer #6 · answered by CAROL F 1 · 0⤊ 0⤋
Try leaving it overnight with a tie strap keeping the brake on. This allows small bubbles of air to naturally rise out of the system.
2007-01-31 06:45:41 · answer #7 · answered by Anonymous · 0⤊ 0⤋
It sounds to me like your master cylinder needs rebuilt.
If the piston in the caliper is frozen , you should still get pressure at the lever.
2007-01-31 05:47:56 · answer #8 · answered by Anonymous · 0⤊ 1⤋
There were so many woodworking plans with this collection and you will not believe this but there are over thousands plans in the one package deal. Go here https://tr.im/XNoue
This is really something to find that many all together. For someone like me who is just really starting to get involved with woodworking this was like letting me loose in a candy store and telling me I could have anything I wanted. That was my dream when I was a kid.
2016-02-07 13:53:07 · answer #9 · answered by Anonymous · 1⤊ 0⤋
most cases you have to back bleed via the bleeding screw on the caliper and wacth for air bubble out the master cylinder.
2007-01-31 16:29:01 · answer #10 · answered by Skull 5 · 0⤊ 1⤋