J
J_C
Guest
I cannot describe how much this has helped me. The only reason I knew about it was because I read about it in an old old thread that's recently been resurrected (regarding master cylinder ratios). So I thought I'd share the knowledge (I so rarely have it to share! :-D )
So I had endless problems with my brakes. I replaced the old lines with new OEM lines (I know, I know), rebuilt the master with oem piston, bled nearly half a bottle through at various times. I tried the screwdriver trick and the zip tie over night trick. I recently installed one of those ebay 14mm master cylinders and still could feel sponginess. I knew there had to be air in the system, even after profusely bleeding. This is what finally worked for me:
I pumped up the pressure in the system, and zip tied the lever down. I started at the pistons and, using my fingers, gave many quick taps to the lines. I worked all the way up to the top banjo bolt. I left it over night.
The next morning, I went down and clipped the zip tie. It felt better, but still spongy. I used my bike cover to cover the entire bike except for the right handlebar. I placed a rag around the upper banjo bolt. Once I pumped up the pressure in the system, I held down the lever as hard as I could and cracked the banjo bolt. *PFFFFFFFTTTTT!!!!* A fine mist and a puff of air came shooting out.
I put on goggles this time, and did it again. Another puff of air. I did it until all I got was a squirt of liquid.
I thought I'd try one more time. I zip tied and tapped, and left it over night. The next morning I clipped it, it still felt good, but figured what the heck. I cracked again, and *PFFFFFFTTTT!!!* another mist came out. I cracked it another two times until I was sure all was coming out was a thin stream of fluid, no air.
The results are incredible. Now we're talking about true two fingered breaking. I feel it engaging very shortly after the switch is triggered, and it is a progressive pressure I feel on the lever. I wasn't able to take the bike out today, but I can't wait until next week when I'm back from my business trip to see if I can make the front tire bark. I suspect I finally might be able to.
So I had endless problems with my brakes. I replaced the old lines with new OEM lines (I know, I know), rebuilt the master with oem piston, bled nearly half a bottle through at various times. I tried the screwdriver trick and the zip tie over night trick. I recently installed one of those ebay 14mm master cylinders and still could feel sponginess. I knew there had to be air in the system, even after profusely bleeding. This is what finally worked for me:
I pumped up the pressure in the system, and zip tied the lever down. I started at the pistons and, using my fingers, gave many quick taps to the lines. I worked all the way up to the top banjo bolt. I left it over night.
The next morning, I went down and clipped the zip tie. It felt better, but still spongy. I used my bike cover to cover the entire bike except for the right handlebar. I placed a rag around the upper banjo bolt. Once I pumped up the pressure in the system, I held down the lever as hard as I could and cracked the banjo bolt. *PFFFFFFFTTTTT!!!!* A fine mist and a puff of air came shooting out.
I put on goggles this time, and did it again. Another puff of air. I did it until all I got was a squirt of liquid.
I thought I'd try one more time. I zip tied and tapped, and left it over night. The next morning I clipped it, it still felt good, but figured what the heck. I cracked again, and *PFFFFFFTTTT!!!* another mist came out. I cracked it another two times until I was sure all was coming out was a thin stream of fluid, no air.
The results are incredible. Now we're talking about true two fingered breaking. I feel it engaging very shortly after the switch is triggered, and it is a progressive pressure I feel on the lever. I wasn't able to take the bike out today, but I can't wait until next week when I'm back from my business trip to see if I can make the front tire bark. I suspect I finally might be able to.
