I removed the manifolds some months ago when I replaced the thermostat and besides time, that won't be any problem for me, but managed to get a good look at the sprockets only by removing the battery carrier and stripping the sprockets cover off, everything seems fine, belt is good with no cracks and the sprockets have no visible damage or wear, the only thing that got my eye is that both sprockets don't spin exactly around the center and they have about 1mm of excentrical movement, what would that mean and could it be that this is the reason for the ticking? Anyways, the ticking is coming 100% from there as it was way more hearable with the cover off...
Link for the video taken with the movement:
Video