There is a bearing in there somewhere. Does it turn smoothly when not engaged?
if it has the 3 adjustment nuts it comes apart to look at the plate. I would remove it from engine and take a look see
View attachment 45074
Here is a picture i dont know if it is like yours
That looks like an ogura clutch not sure if you can purchase individual parts. May be best to buy new replacement. Does the clutch still have the part number sticker on it.
yes there is a torque setting not sure what without a manual. A new one comes with torque number if you go that route.