Bleeding brakes...

dricked

dricked

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Ok I bled the living crap out of my brakes after changing the pads/lines and cleaning my calipers. They work fine no fade (track bike) but they're spongy....like really spongy. I used a whole 350ml bottle of fluid while bleeding untill there was no bubbles, tied the lever back over night, bled the master again in the morining, tapped the lines etc... Does anyone have a trick to this that I don't know?
 
Have you done this before?
if the Banjo bolts are not tight enough, air could still get inot the system. Don't go over tightening them and strip them tho.

good luck.
 
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Yep quite a few times. Banjo's are tight but not too tight. Had no leaks after it sat all night with the lever zip tied.
 
Tap the calipers with the grip end of a screw driver. Tap, firmly, alllllll over each of them for a minute or two. Then tap the brake lines, starting at the bottom and working your way up. Do this a few times...
Then tap the calipers again, and the lines again... Let the bike sit for an hour or so.
This will make any bubbles trapped in the calipers or lines rise up to the master cylinder.
If your master has a bleeder valve on it, then bleed the master cylinder, if not bleed at the caliper again.
Remember, only open the bleeder valves a tiny bit; just enough for the fluid to escape.
In the container you are using for the extra fluid, make sure there is enough in there so the bottom of the tube you are using on the caliper is submerged in brake fluid, also make sure the tube is snug on the bleeder valve... This will prevent any air from getting back into the caliper via the bleeder valve....
As already mentioned, make sure to check the washers on the banjo bolts, and that those bolts are snug.
Cheers
 
What method are u bleeding by?
 
Pump the lever, crack the bleeder. I have a tight fitting hose and have a bend in the hose that raises above the bleeder so there's fluid there at all times (if that makes sense?). I haven't tried bleeding it since my track day last thursday so I might find some bubbels when I do.
 
dricked said:
Pump the lever, crack the bleeder. I have a tight fitting hose and have a bend in the hose that raises above the bleeder so there's fluid there at all times (if that makes sense?). I haven't tried bleeding it since my track day last thursday so I might find some bubbels when I do.
Click to expand...




A general procedure once you have put rags on your tank.... to protect things from potential splashes:

- Use only new brake fluid from a new sealed container as moisture contaminates brake fluid. Open containers sitting around from prior usage will contain moisture from the air.
- Use DOT 4 or 5, silicone or non-silicone as required. Do not mix.

- Remove the reservoir cap, diaphragm part(s)....
- slowly pump the lever a few times until no air bubbles can be seen floating up from the holes in the bottom of the reservoir
- this bleeds the the air from the master cylinder end of the line
- top up reservoir if necessary.

- pull dust cap off of caliper bleeder (if there is one)
- use box end of wrench to slightly loosen the bleeder valve if it is tight, then close it snugly only
- attach clear hose to bleeder valve and place the other end of the hose in clean brake fluid in a container (I like a clear/clean jar)(this fluid will never be used again)
- using the open end of the wrench bleed the front brake caliper that is attached via the shortest brake hose to the master cylinder (on a 2003 GSXR750 this is the right side caliper; do not know about your bike or others)
- bleed by slowly pumping the brake lever a few times (slowly in and out so as to not splash brake fluid out of the reservoir and onto the bike's paint or your face; and to not introduce air into the bottom of the reservoir )
- hold the lever by squeezing it
- crack the caliper bleeder valve and feel the lever move towards the handlebar.
- close the caliper bleeder valve snugly before the lever gets 100% to the handlebar
- pump lever slowly and repeat bleeding until you no longer see air bubbles of any size coming out of the caliper by looking at the clear hose next to the caliper connection
- keep an eye on the reservoir level never letting it get too low
- torque tighten the bleeder valve when complete

- repeat on left side caliper and/or rear brake

-CHECK the brakes operation before you hit the highway!!:lol:

Good luck,
Hope this is of some use.
 
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