Posts
4
Joined
1/9/2018
Location
AU
I went riding yesterdy and after about 10 minutes of riding I noticed my bike slowing down rapidly when I let off, then probly 2 minutes later I noticed the bike riding like it was under a big load, so I let off and my rear brake locked up on me. I touched my brake disc for a split second and my glove was smoking, so the disc was clearly hot as hell. It took about 10 minutes to cool down so I could move the bike again. I was wondering what the fix might be, the pads just need to be backed off a bit so they don’t rub in the first place (causeing them to expand and overheat). Cheers !
Another possibility, which I encountered years ago on a 1988 KX500 was that the rear brake calliper forks (the part that the outer pad rests against) would wear really quickly and hence the outside brake pad wasn't being held perpendicular/flat to the disc. This caused the brake pads to tilt and lock onto the pins rather like how a silicone/caulking gun works. That caused the brakes to bind, which in my case resulted in the brake fluid boiling. That caused no brakes. So, not the symptoms you are describing but worth checking. Just see if the outer pad has worn evenly or excessively more at the top. Never had that on any other bike since so maybe it was just that model.
The Shop
Would also be a good idea to remove the caliper from the caliper bracket. Clean the slide pins and the holes they sit in thoroughly and re grease. This will help the caliper to float and not rub on the disc as is spins. If your caliper can't float freely the pads may be rubbing on the disc, causing the heat build up and eventual full brake lock
Also check to make sure the disc isn't bent
There is a tiny hole in the master cylinder that lets the pressure bleed off. It sounds like there is some debris blocking the hole. Flushing the system and not overfilling will probably take care of it
Post a reply to: Please help