Ok I back at my computer and everything looks fine. The slop in the oil pump bicycle chain looks to be normal. I would like to see what style lifter piece you have and if its the smaller one I would change it for the newer style
Like I said earlier is quite obvious you know how to keep it adjusted and use it but a the newer one will be a little safer if anyone else rides it or if your planing on tuning it. The tuner just might muck it up with the small one verses the larger one. and it will eliminate some of the rattle that comes with having to have free play in it.