Isolatic queston

Can someone explain to me what is the purpose of the poly thrust washer?
As I see it, the inward force on the rubber isos is applied by pressure on the cradle endcap, and that pressure is applied by
the threaded iso adjuster. So, why is there a poly "thrust" washer? Why not just eliminate it entirely?

If you mean the bronze impregnated PTFE washers, I would reckon they cut down friction, noise and offer a little compliance.

Cash

There are two plates at the ends of the Isolastic cans. Inner moves with the can and engine. Outer is located by the bolt fixed to the frame. The inner plate moves with the engine with respect to flex in the rubber buffers and bushes. The PTFE washer is fixed to the outer plate and is the friction interface with the inner plate. Without it there will be considerable wear on the metal parts.

David, how is the washer "fixed" to the outer plate, I thought there was no glue or other attachment?
And are you agreeing then that the washer serves no other purpose other than to cut down on metal wear of the endcaps?

highdesert said:

David, how is the washer "fixed" to the outer plate, I thought there was no glue or other attachment?
And are you agreeing then that the washer serves no other purpose other than to cut down on metal wear of the endcaps?

Click to expand...

I don't have any experience with vernier type, but my shim type outer plate has a center post that the PTFE washer fits over keeping it centered.

my pfte washers had deteriorated to dust.
my motor moved around considerably until I replaced them
now it is so sweet.
Mine are part of thee equation w/ iso's.
I'm a pre mkIII rider.
Marshal