Warped rotor?
Scuse my ignorance but I don’t know what that is?
the rotor rotates between the pads. You might call it a disc. They can warp as they get thinner with age. What mileage is on the disc?
it might be contamination on the disc - run your finger over the disc (make sure it is cold) and see if it feel bumpy. Some pad compounds can cause a build up of "brake dust"
I'm sure there is a Youtube video about the best way to clean them
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The rotor is the brake disk
Are you new to the bike ? I ask because they have linked brakes that feel strange when you’re not used to them, sometimes it feels like the rear pedal is moving up and down under your foot
Yes that’s exactly how it feels. I’ve had the bike for a while but the pulsing seems to have gotten a lot worse lately
Tis a shiny bit of circular metal with holes in it, upon which the brake pads do grab hold of, to slow you down. It is know as a brake rotor(s), brake disk(s) you can overheat these by using your brakes aggressively or indeed excessively or riding at decent lick (speed) with you being completely unawares and covering the rear brake pedal with your toes, thus constantly applying a gentle amount braking/friction, with enough distance covered, the rotor will get very hot, and can warp.
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Might want bleeding, they can get a bit spongey after a while, BMW recommends every 2 years
Try cleaning the pads and disk with a squirt of brake cleaner as wessie suggests, it can’t do any harm and might help a bit at least
Is the bike new to you (used) or did you buy it brand new? If former, chances are the previous owner maybe had summing to do with it being “pulsy” under controlled low speed braking.
It’s a warped disk
Easy to replace also replace pafs
Easy to replace also replace pafs
Could be! I think I’ll take it to a bmw engineer to have a look, just wondered if this was a common issue
The discs 'float' on bobbins which allow very slight lateral movement. If any of those is seized it could cause an issue.
Front discs do, rear disc doesn’t
Alan R
Good point
