Join Date: Sep 2016
Location: Invercargill, Southland, New Zealand
Sounds like you've got a mix of generations of BMW discs there - one 'floating' and one not. Used to have dual floating on the old K1100RS - they're the ones with the 'bobbin' the screw goes thtough and the wave washers etc to try to stop the disk rattling... Guess they re-used them on the classic K12s too - but on my 2002 K1200RS both of the front discs are fixed, eg hard screwed, no wave washers etc. (come to think of it that's what I had on my 96 R1100GS too, so obviously they were using both types across multiple models at the same time).
South Is, NZ