All twin cams have a cam tensioner for the inside short chain & another for the outside long chain, outside one what you can see easy, inside you can't see.
Hey Krash, was the gear drive very noisy?
Ratbob , at the time, I could not hear below 100dec , now have two bionic ears . when I'm up Sydney next I'll listen to it let you know. but guessing it would be something like the Gear drive old EH Holden six's, used.
I would hope to fuck the gears are nothing like the old EH timing gears. They were made of plastic . I spent four days and nights stuck at Ayers Rock when the cam gear shit itself. Just as well we had a rather large bag of dope to smoke.