DOHC750 Cam chain adjustment?

my-79-750-k

Therapy is expensive. Riding is cheap. You decide.
Just wondering if there is any kind of adjustment I can do to the cam chain that connects the cams ONLY in the dohc cb750 engines. There doesn't appear to be any from first glance, but maybe I'm missing something? If not, is it possible to change in a new chain without removing the cams and having to re-time it all in?
 
Two adjusters, one in front above No. 3 cyl/center, one at back under carbs which gets overlooked
 
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