Question:
Have just stripped and rebuilt the front calipers on the ZZR. Have put everything back together , filled up the reservoir and began pumping the lever. Have had zero success in getting any fluid from the reservoir into the hoses etc while bleeding from either caliper. Any hints. tips, trick tools etc gratefully accepted for hopefully a quick fix.
Answers:
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If you are NOT in a big-*** hurry, mother nature may do the job for you. sometimes gravity bleeding works. open the bleed screws - put rags around them - hoses on them if you want - but usually fluid may come out around the threads of the screw too. Leave the cap off the reservoir. go have a beer - watch a ball game - check back every 10-15 minutes and top up the master reservoir. Obviously if the fluid is not going down this is not working.Plan B: you MUST get the master cyl piston full first. Some one suggested "removing" the brake hose. Don't remove it - all you have to do is crack it a little bit. Remember as soon as you move the brake lever about 1/2 inch the port in the reservoir is covered up . so just move the lever a little bit - 3/4 in or so and watch for bubbles to come out the port. That is good - means that the air is coming out of the master cyl piston and fluid is going in. Turn the bars so the port is the high point (so the air will go up and out).
another thing to watch out for. if this is a side stand bike - you may have to stand it up straight - or even lean it over to the right - and turn the fork so the bleed screw is AT THE HIGHEST point of the down side (left) caliper - other wise you may never get that last bubble out of there.
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leave the filler cap open and keep slowly pumping the brake, keep topping up the fluid until fluid appears at the caliper. put back on the filler cap and tighten the bleeder nipple. slowly pull the brake while open the bleeder nipple until the brake lever goes solid. then top up reservoir back up.Best street bike for my body type?
Those particular calipers can be a real ***** to bleed. You'll get there eventually if you carry on witht he traditional method but it's much easier to pull the fluid though using a big syringe or one of the purpose made gizmos (e.g a Mityvac).What bikes are given at the MSF courses when you take that class?
Is the brake bleeder valve open? If the valve is open and you still can't get any flow, there is probably a blockage somewhere in the system. Occationally the bleeder valve will corrode, blocking hte flow. I would start there, and then work your way back up the system to find the blockage.FILL THE CYLINDER,UNDO THE BLEED NIPPLES,AND LEAVE IT TO GRAVITY.YOU COULD GIVE SOME IT SOME ASSISTANCE BY USING THE PALM OF YOUR HAND AS A PUMP OVER THE TOP OF THE RESIVIOR..HOPE IT WORKS.ONCE FLUID IS THROUGH THE SYSTEM,BLEED AS NORMAL..
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Try bleeding the master cylinder first.--Cover all painted parts and use plenty of rags when bleeding/removing hoses.
--Remove the brake line from the master cyl.
--Block the hole of the MC with your finger.
--Pump the brake lever and release your finger as if it were a bleeder valve.
--Squeeze the lever slightly to get a little pressure and quickly install the brake line.
--Then use the brake line bolt (banjo bolt) as the bleeder valve.
--Then use the banjo bolt at the caliper as the bleeder.
--Then bleed normaly with the bleeder valve.
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use a presure bleeder its so easyMore Questions & Answers ...
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