350 CB oil pump... I read that the early small piston pump puts out more pressure. It had to, in order to keep the early cam chain tensioner working, (pressure system), However, Honda changed the cam chain system, and went to the different,(lower pressure) pump at the same time. That's what one of the Brit bike mag. said. Classic MC mechanics? Both systems suck. I have never heard any bad things about the KL tensioner. Wild Bill D. has one. I think Clancy Pants has one also. They had them before they were "legal", I'm told. (I need to buy one for my new 350 street bike.)