Grizzly 700 Oil pump chain and water pump

Hello there!

i’m currently doing a big maintenance work on my 2009 Grizzly 700, it has about 6500 km (~4000 miles) on it.

I looked around and could not find any info about oil pump chain life expectancy neither water pump seal/impeller life..

Any one of you guys got a clue? I do not have any current issues with my ATV except wear and tear (replacing all 4 engine mounts, a busted steering knucled, adjusted valves, checked timing chain tension, will check compression, and will install HMF Titan QS exhaust and fuel optimizer)

The ATV is kind of halfway stripped, i do not wish to spend more and spend more time tearing in, but hey.. i’m almost there. Should i replace it or should i expect at least another year or two of trouble free regarding those two items?!

Thanks!