When the brake locks is the brake pedal stuck down? I'm just trying to figure out if it's the actuating cam that gets stuck or if that is free to move but something else in the system is getting stuck. I'm wondering if the cam is upside down too.Scott
everything is looking sweet and aligned. i have to undo the brake nut on the rod a little to free the wheel afterwards. ive been too scared to really hit the back brake hard for fear of bending everything. so when these little lock ups happen they are little ones. the next thing to check is the pedal end. its a bit loose up there, but honestly i cant really see how that would cause it.
Not to state the obvious...... but that spring should have no problem pulling that rod back when you release the pedal. There is a lot of tension in that spring, or should be. By loosening the nut, your making it easier for that spring to pull the rod back. Sounds like something may be binding and or bent, from that spring/ arm, through the rod to the pedal. I no longer have the stock set up, so I can't look. But is it possible that the pedal travel adjustment is sooo loose, that you are getting it into a position... down so far. That the rod winds up straight, binds and can't return?
I always adjust rear drums by putting the bike on the centerstand, and spinning the rear wheel, while slowly tightening the adjusting nut, until I feel slight resistance, then I back off just enough that the resistance is gone. I like as little play in the rear brake pedal as possible. I would check that spring, and the whole linkage for something that is binding. It may not be in the actual brake at all.
i think thats it...
so i just spent another 3 hours on it. a waste of time again im sure. the cam bolt thread is absolutely rooted - not to mention way too short. You cant even get the nut all the way on. the nut wil go on just over halfway. Not enough purchase. this mechanism needs more than that. the original bolt you could get 2 nuts plus the measurement gizmo...
Perhaps we could make a group effort and reply to the video informing others to NOT do this. That way when someone new views the video they will see the multiple replies saying this is a bad idea and give it a second thought before doing it. Just an idea.
...when assembling the rear brake there is the point when you should step on the lever with loose nuts at the brake cam bushing in order to allow the cams to center themselves. But afterwards it´s done and you must fasten the nuts then. The cams are not designed to center themselves on every single braking...
Well I finally did find out one thing. My drum is out of round.I put it on the centerstand, and kept spinning the wheel by hand, while tightening the adjuster nut til I could hear it rubbing, but it didn't rub all the way around, more like half of a turn, then no rubbing. Even if the shoes are not centered, the only thing that can cause that is an out of round drum.
My mechanic has seen one if these. Not necessarily out of round but the brake surface and bearing seat are not on the same center. No way it can ever work. On the front end, loosen the lower triple bolts and the axle bolts. Loosen the steering tube clamp bolts on the upper nacelle. Wedge the front wheel against the wall and twist back and forth. Get things centered and tighten things up again. There may not be anything bent, just twisted out of alignment. Scott