02-01-2022, 12:21 AM | #1 |
Join Date: Oct 2021
Location: Lumberton TX (Southeast TX)
Posts: 110
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Rear Caliper Stuck Shut On New 2021 TBR7
When I took the rear brake caliper off its mount, I turned it a little to look at it and the caliper gently jiggled shut. Now it's shut tight as a drum. There's no prying it apart because you can't get a screwdriver in there. Do I need to bleed them? If so, can someone provide me a link that shows me how because I don't have a clue. Never bleed brakes of any kind.
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02-01-2022, 07:30 AM | #3 |
Join Date: Oct 2016
Location: Carrollton, GA
Posts: 1,467
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I would carefully open the bleeder screw and then very carefully try to push the piston back into place. What may have happened is that the piston moved forward far enough to come out of the bore, and if you get a huge pry-bar and go crazy it's possible you can damage something. Also, don't forget to open up the lid on the reservoir so the fluid that doesn't come out the bleeder screw has somewhere to go. Generally speaking, a piston should never come out of the caliper on it's own. There has to be a leak somewhere that allowed that to happen. Please let us know what you find.
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02-01-2022, 08:04 AM | #4 |
Join Date: Feb 2021
Location: Kansas City
Posts: 2,612
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If you have a plastic or rubber/nitrile tube that fits on the nipple on the bleeding nut, put it on so that when you open it, you can have it drain into a jar instead of all over the floor and your hands or the tire itself!. The tube also helps prevent air from going back into the caliper's cylinder(s).
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02-01-2022, 09:57 AM | #5 |
Join Date: Oct 2021
Location: Lumberton TX (Southeast TX)
Posts: 110
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Thanks again Magician16. I ordered the mini bleeder tube suggested in the video.
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02-01-2022, 10:15 AM | #6 | |
Join Date: Oct 2021
Location: Lumberton TX (Southeast TX)
Posts: 110
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Quote:
Luckily, since it's shut so tight that I can't get the smallest screwdriver in there, I haven't gone crazy on it as to damage it yet. The reservoir is barley filled to the bottom level so maybe there's not a leak, just not enough brown China brake fluid that caused this. I'll report back to y'all and let you all know. Again, thanks for the advise everyone. Couldn't do this without y'all. |
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02-02-2022, 06:13 PM | #7 |
Join Date: Jan 2021
Location: Lehigh Valley Area
Posts: 164
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If you have the motorcycle on a lift, sometimes it puts pressure on the foot pedal engaging the brake. Check if the jack is engaging the rear brake.
hth,
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- My 3 Bikes: 1. TaoTao TBR7 (My TBR7 Upgrades) 2. Boom Vader (FYI: My Boom Vader Upgrades) 3. 1978 Suzuki SG750 --------------------------------------------- Testing a YouTube Channel |
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02-04-2022, 07:20 AM | #8 |
Join Date: Oct 2021
Location: Lumberton TX (Southeast TX)
Posts: 110
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Maybe I Busted It The Rear Caliper
I sure appreciate all of you taking time to turn me on to you all's wisdom that certainly far exceeds mine.
Btw, I did take it off the Jack just to make sure Cheap Thrills suggestion wasn't happening (great question). I'm thinking back 2 or 3 months ago when I first took the wheel off, after I unscrewed the caliper from the mount, it took what I thought was a gentle hit/fall. When I picked it up, the calipers seemed lose and, just kind of fell or, gently slipped closed. I figured they would open right back up soif I wiggled the pedal or something but they haven't budged since. My mini bleeder should get here today and tomorrow I should have time to bleed/flush the brakes while I try to ease the calipers apart. Saying all that to ask these questions. 1) Do y'all think I trashed the rear calipers? (I guess they're a lot more gentle than I thought maybe.) 2) Have y'all seen anything like this happen before? 3) If I did trash them, can I just buy the caliper assembly or do I need to buy the whole rear brake system (master cylinder, reservoir & caliper.)? 4) Depending on what you all's answers to 1 & 2 are, could you provide a link to what might fit that's, hopefully, the most affordable? Again, thanks so much for you guy's help. My 2021 TBR7 would have to be an anchor for the boat I wish I had if it wasn't for y'all. |
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02-04-2022, 08:24 AM | #9 | |
Join Date: Oct 2021
Location: odessa MO; donna TX
Posts: 152
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02-04-2022, 10:00 AM | #10 |
Join Date: Dec 2018
Location: PNW
Posts: 983
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Once you get it all done, you will be a go to guy on the TBR7! Ha Hah and will be providing help for others! You always learn the most from the stuff that gets messed up and is difficult. At the time it is no fun but later you realize how much it helps you get better and avoid similar issues to get things right. We have all been there!
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02-05-2022, 03:58 PM | #11 | |
Join Date: Oct 2021
Location: Lumberton TX (Southeast TX)
Posts: 110
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I didn't actually drop the bike. It was the caliper that got away from me. Couple of more questions please: 1) The cable/line running from the master cylinder to the capiler runs directly over the bleeder valve not leaving enough room to get the tube on there without kinking it. I definitely can't get the Motion Pro Mini Bleeder on it. Will I hurt anything if I loosen the bolt on top of where the line connects to the caliper, move it over just a little, and then tighten it back up so I can get the tube on? I'd put it right back afterwards. 2) Severely wrote, "you will want to pry on the steel edge of the brake pad rather than the pads themselves". Is that the two shinny chrome looking bars/rods I'm seeing under the pads? It doesn't seem like there's enough room to get to them to move them. I guess I could put a piece of rubber over a thin, flathead screwdriver to do it. |
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02-05-2022, 05:15 PM | #12 | |
Join Date: Oct 2021
Location: odessa MO; donna TX
Posts: 152
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02-05-2022, 10:08 PM | #13 | |
Join Date: Oct 2021
Location: Lumberton TX (Southeast TX)
Posts: 110
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Look out gentlemen. The animated emojis are out of control! I appreciate y'alls awsome help more than words and animated emojis can describe. Sorry but I still have questions though. 1) Does anyone know what those 12mm caliper mounting bolts should be torqued at? 2) Not that I went crazy spreading the pads apart but, would it have been possible to spread them too far? 3) For some stupid, inexperienced reason, I tried to bleed/flush the brake fluid before spreading the pads. It got to the point where there wasn't any spongy-ness to it. The pedal would just bottom out and no fluid was really coming out. The fluid in the reservoir wasn't depleting either. Any suggestions? Again, I appreciate and value you all's help so much |
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02-06-2022, 09:10 AM | #14 |
Join Date: Aug 2019
Posts: 472
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1. On a Bashan, it's 18-22; I assume it's the same. I don't torque them. I just put loctite on them and tighten them to where they feel tight.
2. You could possibly break the pad, but you'd have to beat your lever with a hammer. 3. You pulled a vacuum in the line caused by the check valve in the mini bleeder.
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2018 Bashan Storm(sold) 2016 Magician 250 |
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02-06-2022, 10:09 AM | #15 | |
Join Date: Oct 2021
Location: odessa MO; donna TX
Posts: 152
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