1998 gsxr 600 brakes lock on, new master and

When you bleed brakes make sure bleed nipple is pointing downwards and the whole caliper is upside down so the fluid runs through the whole system, each time i change pads on mine i have to do this for some reason. Hope that helps

Check the fluid level in the front master cylinder. Chances are you need to add some brake fluid and then bleed air out of the system. There is a bleeder valve on the handlebar at the lever and one on top of the wheel caliper. Please rate my answer. Thanks.

Most likely the master cylinder bypass valve is stuck you would have to replace the master cylinder to fix this problem. However to test it for this problem apply the brakes with everything together next open the bleed valve without stepping on the brake, does fluid shoot out of the bleed valve? if yes then you master cylinder is defective. If it is cable operated then pull the clevis off the brake and see if the cable moves smoothly and does not stick, if it sticks replace the whole cable assembly. If you still need help just reply to this post and thanks for using fix-ya.

sounds like bleeding them should help. It takes two people. Squeeze the brake lever about a dozen times, then hold the lever in. While holding, have someone loosen the bleeder valve on the brake caliper about a quarter turn. Just enough to see the brake fluid leak out and the lever start going in, then retighten the bleeder valve. Do this about three times for each caliper. Don't forget to keep an eye on the brake fluid because if you let it run out, you will put air in the lines and have to start over.

Sound like you've hit the nail on the head. Rebuild master cylinder with new seals, also rebuild rear caliper with new seals, check condition of pistons you may find that they also need replacing.

Brake fluid will eat away at plastic and paint!
Wipe any spilled fluid with the rag and lots of water.

Tools needed:

Wrench/Spanner (average 10mm)
Brake bleeding kit (rubber fitting, clear hose, small container)
Brake fluid overflow container (to put the brake bleeding kit small container in)
Rags
Brake Fluid

Attach the brake bleeding kit to the brake fluid nipple located on the brake caliper.

Loosen the nipple so the fluid is free to flow down the brake bleeding kit tube and into the small container

Remove the master cylinder cap (top) so you can monitor and refill more brake fluid into the master cylinder as you bleed the brakes.

Pump the brake lever so the old/new brake fluid is forced through the tube into the brake bleeding kit fluid container

Keep the volume of the master cylinder constant (near full) as to not have it empty. Keep pumping on the brake lever until the fluid coming out is clear (rather than the old brown/black colour).

Once all the tiny air bubbles are gone hold pressure on the brake level and re-tighten the brake fluid nipple to close it off.

Replace the master cylinder top cover.

Remove the brake bleeding kit from the caliper and use the rag and water to clean up any spillage.



Alternately, you can pump the pedal once, open the bleeder then shut it, pump the pedal again, open the bleeder and shut it and continue (adding as necessary) until the fluid is clear.

The advantage to doing it this way is much less pumping to get the air out of the lines you created when you first started on the first method.

hey

bike brakes are a pain to do man!! id use a bleeder kit on it and if this doesnt work then your master cylinder at the pedal is gone!! iv a fzr600 race bike and thats ten times worse man