front brake discs help

[geo28]

hi guys ,

i have a problem with my front brake discs on my 1150gs a few weeks back i noticed that the wavy spacer washers were missing out of one side of my front disc , so i went to mr bmw and ordered 5 brand new ones and fitted them and last weekend i went on a trip round scotland but on day 3 i noticed that not only had all the new wavy washers that i had just fitted gone but the ones on the other front disc had also gone so i had to drive from Durness on the north coast of scotland back to glasgow with the front of the bike rattleing like hell .
what is causing this problem both disc now move in and out and round the line of the wheel about 3 mm in all directions?
any help would be appriciated as i dont want to keep replacing the washers if there is another problem.

cheers geo

 

[Packer]

Have you tried removing the calipers and checking that all the pistons are moving freely? Having seized pistons on the BMW EVO equipped bikes is a common fault and could mean a lot of force being put on the wavy washers that they shouldn't aren't designed to cope with.

Are the discs badly warped?

 

[geo28]

ive checked the discs they are not warped and the pistons move under finger pressure and there is no movement in the wheel bearing. should i just keep buying the washers and replace them every time they disapear?
or is some thieving gypsy stealing my washers in the middle of the night

 

[Packer]

Hmmm, I wonder if someone has fitted the wrong length bolts. There should be some moement of the disc possible against the washers when the bolts are torqued to the correct setting.