02-18-2020, 08:48 PM | #16 |
Join Date: Jan 2020
Posts: 287
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I finished flushing and bleeding the brakes. I have it set up with the a zip holding the brake lever in slightly. I tapped on everything attempting to loosen any trapped bubbles.
I’m planning on removing the caliper tomorrow night and hit the pads with some sand paper. Then take her for a spin. |
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02-19-2020, 04:21 AM | #17 |
Join Date: Nov 2017
Location: Marseille, France -> Conakry, Guinea
Posts: 1,481
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Don't do DOT 3, 4 is better, 3 is outdated.
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02-19-2020, 08:06 AM | #19 | |
Join Date: May 2013
Location: finger lakes NY
Posts: 2,061
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Quote:
i have used this on every set of pads i have used, and all with great performance, wether on my Bicycle disc brakes, my dodge truck, motorcycle brakes, car brakes etc... its all about building a layer of brake pad compound on the rotor, and doing it evenly, hence the not stopping with hot brakes... |
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02-20-2020, 08:35 PM | #21 |
Join Date: Jan 2020
Posts: 287
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I attempted to break in the brakes as bogieboy suggested. I did this last night and let everything cool down as it was late. I took the bike out tonight. I would say the brakes are marginally better.
Perhaps I’m asking for too much. I was testing the bike after doing my first valve job. Probably the longest valve job on record. lol! The bike idles much better now. |
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03-23-2020, 08:27 PM | #22 |
Join Date: Jan 2020
Posts: 287
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New brake problem.
After bleeding the brakes with the vac pump and breaking them in they do work better. Now the break lever will pull in when at a stop. After about 30 sec of constant pressure the lever will touch the grip. Not good! I had a friend pump the lever then hold, I released the fitting on the caliper and bleed the lines this way. I did this several times and refilled reservoir. No change. Brakes stop and pump up but.... Any ideas? |
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03-23-2020, 08:37 PM | #23 |
Join Date: May 2018
Posts: 1,637
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Is the fluid level dropping ?sounds-like you might have a tiny leak in the system ,
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03-23-2020, 08:56 PM | #24 |
Join Date: Jan 2020
Posts: 287
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No leaks, that I can see. Never had the issue until I opened the system.
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03-23-2020, 09:59 PM | #26 |
Join Date: Jan 2020
Posts: 287
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I used Auto Zone brand dot 3. Figured it was better than the OEM stuff from China. It’s an enduro that barely does 70mph on a good day ,not a race bike. I didn’t see the need for a DOT 4.
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03-23-2020, 10:15 PM | #27 |
Join Date: Apr 2019
Posts: 336
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though i have bled a few brakes in my day i am no expert......sounds like there may still be air in them.... tapping the entire system and also flushing again may do the trick....
fwiw my tbr7 brakes are pretty lame currently but i have only had it up and running one day and have yet to flush the brake system.... of course that helps you in no way.
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03-23-2020, 10:36 PM | #28 |
Join Date: Jan 2020
Posts: 287
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I had the same issue . At first . The rotor must be cleaned well first. I bedded the brakes as another member suggested with a link. It worked. They improved greatly over time.
Could I have damaged something using the vacuum pump? I started thinking about it. When I used the vac I didn’t use a zip tie to hold the lever towards the grip. I simply removed the master cylinder lid and opened the valve on the caliper with vacuum tube attached. I kept the pressure within the correct limits. Drained and refilled the reservoir several times without completely emptying it. |
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03-24-2020, 03:05 AM | #29 |
Join Date: Nov 2017
Location: Marseille, France -> Conakry, Guinea
Posts: 1,481
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Just attach the brake lever to a broom, tie the lever down, and hold it vertically overnight, unless you've got air in the caliper it'll get it all.
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03-24-2020, 10:54 AM | #30 |
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,100
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Assuming you still don't have a tiny bit of air still trapped in the system, you also just may have a slightly bad master cylinder piston seal. This would allow you to build pressure, but over time the pressure will bleed off as the fluid escapes around the piston seal back into the reservoir. It wouldn't be that unheard of on these cheap bikes.
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