The Discs in the RST clutch that we will be using have a full-face organic friction material, this is an exceedingly smooth engaging material that is very forgiving. The clutch will be getting its holding power from the fact that it has two of these discs! The organic material is interwoven with brass wire which gives it more heat resistance and reinforces the material for improved burst strength.
The friction material is bonded to a metal backing plate, then riveted to the disc itself. The metal backing gives the friction material a big boost in strength and burst resistance.
This is the floater plate that couples both of the two discs to the flywheel when the clutch is engaged. Part of the clutch’s secret for reducing multi-disc clutch noise is holding the floater in place with thick drive straps. You can see the drive straps here bolted to the outside edge of the floater place. Typically for a twin-disc clutch, the floater is allowed to freely move around where it can chatter and vibrate making the characteristic twin-disc clutch ringing noise. The straps hold the floater in place and keep it from making noise by restricting its free movement.
The first disc sits on top of the flywheel, then the floater is put on top of it, The drive straps are bolted to the flywheel. You can see that the drive straps are almost straight and hold the floater slightly off the disc and flywheel, this is important to reduce noise.
