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Master cylinder/calipers - 81 gs850l

  • Thread starter Thread starter remo
  • Start date Start date
R

remo

Guest
i wasnt getting any compression from the master cylinder, even after taking it apart and cleaning it. i thought i was going to have to rebuild it, but when i disassembled it again, i noticed that there was actually alot more rust and crud that needed to be cleaned out than i previously thought. so i gave it a very thorough cleaning this time, paying particular attention to the small port where the fluid enters the bore. so i reassembled it, and before i reattached it onto the bike, i submerged it in brake fluid and pulled the lever. i could now see bubbles which means its working. which is great. then i had the problem of the stuck caliper pistons, so i figured i could just clamp the brake lever down and it would force the pistons out, as ive read other people having success with this method. but when i did this, after everythings connected, i still have the same spongy feeling from the brake lever. i disconnected the banjo fitting at the master cylinder, and put my thumb against it, there is still compression there and fluid squirting out, so i know the cylinder is working now. im thinking there must be a leak in one of the hoses somewhere down the line. am i on the right track or is there something im missing?

thanks for any and all advice!
 
Suck vacuum on one of the caliper bleed nipples and fluid will draw down out of the master and prime the system.

Oh, and please tell me you changed the rubber brake lines. Suzuki calls for changing them every two years, and if you leave them on the crud on the inside will contaminate your brake system.
 
no i havent changed the brake lines, but i will do that immediately. the guy i bought this bike off had it sitting for years, like five years. is there a specialty vacuum designed for this purpose?
 
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