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79 GS1000L master cylinder rebuild issue

  • Thread starter Thread starter CHIrider
  • Start date Start date
C

CHIrider

Guest
Hi everyone,


I installed lower bars on my 79 GS1000L. I had to install a shortened upper front brake line because of the lower bars. After replacing the upper line I flushed the fluid. After trying to bleed the front line properly I noticed the brake master cylinder had a bad o-ring for the plastic fluid reservoir. I bought a replacement o-ring and bought a master cylinder/lever rebuild kit. After installing everything the front brake lever won't pressurize. I pumped the fluid out while adding new fluid. Right now when I squeeze the lever it only moves the fluid around in the master cylinder but not sending it down the line.

I'm thinking I installed the rebuild kit improperly or something else is up. I was thinking about buying a new rectangular master cylinder. Since I just spent money on a rebuild kit I wanted to see if I could resolve the issue before spending more money.

any help would be appreciated.

thank you
 
take it apart and be sure the cups are in right. then fill the master up and put your finger over the hole the banjo bolt goes into. Squeeze the lever and let any air past your finger..hold the lver. Press your finger tight to the hole and repeat till youve got master cylinder pressure. Now, while holding your finger there, get the hose ready to be put in and start it in and tighten the banjo bolt. Now go to the caliper end and do the same..pinch the knuckle in your fingers and let air escape as you squeeze the lever. Do this till you fell good pressure and get fluid. Now hook to the caliper and continue.

The easiest way to do them is to get ahold of a Mighty Vac brake bleeder. Some parts stores will rent them out.
 
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