HONDA - TENSIONER B CAM CHAIN - 14530-MG5-670

cam chain tensioner which was used on many of the Honda DOHC CB750 through 1100 models from 79 to 83. As your engine runs the cam chain is spinning all the time and it slowly wears all of the parts that guide it and put tension on it. If you're doing your top end and you plan to replace the cam chain and it's associated parts, it's a good idea. Check for wear of course, but sometimes it's good to go by the "while you're in there" approach.

The cam chain tensioner is on the front side of the engine.