Pressure plate cup, big twin 700, 750, 850, 1000 and 1100cc, 4 and 5 speed transmission models with twin plate clutches. From 1967 thru roughly 2004, and California Vintage as well. Exceptions are noted below.
This is the piece that the clutch push rod pushes against.
This part not used on small twin V35, V50, V65 or 750 Nevada, Breva 750, or the newest V7 Series bikes. Also not used on any 6 speed V11 Sports or it's variants. Not used on CARC equipped bikes. Not used on V11 California series bikes using the single plate clutch system.