Author Topic: bleeding K75 front brake (non-abs)  (Read 4705 times)

Offline dougrs

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bleeding K75 front brake (non-abs)
« on: June 15, 2015, 08:48:34 PM »
Hey,
I have been doing some front brake work recently, replaced line with SS, new pads, new master cylinder piston, and I therefore have needed to bleed the brakes. I could not get a good bleed and brake feel, even after a few bleeds. So after doing some more research I learned that there are a few tricks that might be useful. I'm sure these are posted here somewhere, but I figured I would put it out there again.
1) park bike on side stand and turn full left to steering lock. Let this sit for a while, I did this before and after the bleed. This will get pesky air out of master cylinder.
2)push the brake caliper cylinders all the way in and wedge them there (block of wood) while doing the bleed.
3) position the calipers so that they bleed valve is near vertical during the bleed.

These things seemed to help me get a much better brake lever feel.

-Doug
  • MD
  • '89 Yamaha FJ1200, '94 BMW K75

Offline Chaos

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Re: bleeding K75 front brake (non-abs)
« Reply #1 on: June 15, 2015, 09:28:18 PM »
I had the same mushy feel after changing a line.  Was going to try vacuum bleeding but parked it facing uphill on a pretty steep slope and it firmed up nicely all by itself.  Dumb luck there!
  • sw ohio
1987 K75S    VIN 0231
Original owner, Original litter
200,000 miles (plus or minus) and 5 paint jobs
sold 6/23
2023 Ural 2WD sidecar (BMW's bastard step child)

Offline dougrs

  • Motobrick Curious
  • Posts: 45
Re: bleeding K75 front brake (non-abs)
« Reply #2 on: June 16, 2015, 08:12:45 AM »
I had the same mushy feel after changing a line.  Was going to try vacuum bleeding but parked it facing uphill on a pretty steep slope and it firmed up nicely all by itself.  Dumb luck there!

I had a similar experience with my FJ1200. My brake lever had gotten a little soft and I was doing some work changing the fork oil. This required removing the clip on with the master cylinder out of the way. When I was done, my brake lever was solid again, the movement had shaken out some air.
  • MD
  • '89 Yamaha FJ1200, '94 BMW K75

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