2004 Rev 800, Loose disk break

[TheronDanger]

My friend has a 2004 Rev 800. We noticed rattling noises coming from his sled and checked it out. The disk for his break has about 2cm of play and feels loose. We don't know to much about this, any ideas or suggestions?

 

[Dmf]

they do have play but over time they get worse. there is a key way that holds the disc onto the jack shaft, its more then likely its worn out. get a new one and install the key way with lots of green locktite