Dop It

Hi, the cam chain on my '89 Radian sounds like it needs adjusting. Having looked at the pdf of the manual it just says " undo lock nut, undo stopper bolt " then tighten lock nut, tighten stopper bolt. Is it that easy, is it spring loaded to get the correct tension or do I have to adjust it via the stopper bolt. I f I do then how do I know the correct tension requiered on the chain.