I just bought a 1972 CB500 that was already fairly disassembled and in the process of cleaning, inspecting , rebuilding, etc. I've already gained much info from this forum! I have a question about the left side cover. I am going to be purchasing some new parts from David Silver for the clutch assembly. For the life of me I can't figure out what part#6 below is or where it goes. It isn't in the loose parts I got with the bike. I have an old Norton that has a similar part and the manual is very clear on where it goes. I have a clymer manual for the CB500 and I can't figure it out. Can anyone help?