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I have a '00 929, I put steel-braided lines on the front end 1 year ago and at the same time, replaced the pads, and fluid with DOT 5.1. The initial bite and brake performance was amazing up until about a month ago. I was had to ride home in the rain after work which wasn't a big deal until I noticed that I had to pull the lever further to get the brakes to have any effect. I let the bike sit for a few weeks and I come back to check the lever and it goes all the way to the bar. I vacuum-bled each caliper and got a lot of air out on both sides. The brake lever had pressure again, but it is not the same as when I replaced the parts. After a few days of riding, I notice the same thing happening and I have to pull the lever further to get engagement. I have CRG shorty levers and last year I had it set to the fourth position (away from the bar). Now I have it fully extended in the sixth position in order to make it work.

Any help is appreciated!
 

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It sure sounds as if you have an air leak somewhere in the system. First point would be to check all the barrel joints for correct torque. Might there be a washer missing from one of them?

Second point would be, was the system okay before you installed the CRG levers? Could there be a fault in the fitting at the Master Cylinder point?

Third point, is there anything significant that happened a month ago that might have affected hoses or front end?

I am fairly certain your problem can only be cause by air getting in the system!
 

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You may need to rebuild your brake master cylinder. Parts are cheap and it can be done with basic tools and circlip pliers. Given the age of the bike I would say it's time. My old 929 had this issue about a year ago. You can also somewhat bleed the Master cylinder by holding the lever and cracking the banjo bolt.
 
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