cam chain tensioner

Hi all. Planning to replace my cam chain tensioner as I suspect a faint ticking noise from right side and warm engine is caused by a worn cct. Not that expensive, seems to be a common issue and almost to be considered periodic maintenance. But, reading up on the task, many seem to point out...

Sorry to be a bother about this, I know there's a million other threads out there but they've not given me what I need to work with. I've messed with CCTs before (One on a Kawasaki ER-5 to be precise), but I have the rattle that everyone else gets and I wish to sort it if possible. One fellow...