Rear rotor and brake pad.

[Geo333]

My 2019 Ryker had the rear rotor became warped. so the rotor and pads had to be replaced. Has anyone else experienced that?

 

[Gwolf]

Could the brake have been out of adjustment and dragging on the rotor? That would produce a lot of heat and maybe warp the rotor, but if the pressure was not enough to notice, it would not be obvious unless you checked close.

 

[Tslepebull]

Has the rear wheel been off the bike for some reason? Could the rotor have become damaged during handling?

 

[Geo333]

The answer to both of these questions is no. It is not a cheep fix, either.

 

[BajaRon]

It is rare that a rear rotor will warp. Have you run a dial indicator on the surface to see where and how bad the situation is? Can you see wobble if you spin the rear wheel? Are your pads wearing evenly? Are the pads dragging on the rotor? It's important to find out why the rotor is damaged before replacing parts.

 

[SportsterDoc]

A high speed stop, especially down a grade, produces a lot of heat.
If at the end of the stop, if the brakes remained applied, the exposed rotor cools at a different rate than the area covered by the pads, which can result in warping.

If the brake pedal is not rotated sufficiently forward to avoid touching with toe while riding, the rotors will get hot and if the brakes are fully applied and remain applied, this can result in warping.

If either of the above is applicable, why only the rear?

 

[SportsterDoc]

Has the rear wheel been off the bike for some reason? Could the rotor have become damaged during handling?

Interesting thought.
Front rotors slide over pins, but rear is bolted to hub.
If debris were under a contact point, the resulting lateral run-out should cause pedal pulsing.

Geo333: How was warpage diagnosed? When was it discovered?

 

[Geo333]

It was diagnosed by the dealer. The pulsating was really bad. so I took it to the dealer to find out what the problem was. They are repairing it, with my OK.

 

[Snoking1127]

Did the rotor show signs of build up on it's braking surface? I had the happen on a truck once and a parts store sold me little 3M rotary pads and a spindle to clean off the build up. Solved the issue for a few bucks.

 

[SportsterDoc]

Pedal pulsing verifies the dealer diagnosis, but the question remains why?

What were driving conditions before the pulsing started?

 

[Geo333]

I will not go into detail, but the rotor issue was my fault. I had done some work on the rear of the bike and caused the damage. End of story.

 

[Possible]

I, for one, appreciate the feed back about the problem. Too many people post about the problem, but never come back to set things
straight as to how the problem was resolved.

Thank you.