I have no idea why there would be 3 corks. were 2 stacked together?
There should be 1 cork glued to each drive plate, which engage against the bare aluminium of the large pulleys.
You would need to check the shims with the new ones in as it would have to be shimmed way out to clear an extra one, there should only be approx. 2mm clearance when assembled.
Last edited by nath; 19/04/22 02:23 PM.