I checked mine when I first got it. The exhaust valve is not too bad to get to. Need to remove a couple of things to make it easier. See post #24 in my thread here. The exhaust valve did not need adjustment, as it turns out.
http://www.chinariders.net/showthrea...t=31297&page=2
The intake valve I was not able to check because of too much stuff in the way. I might be able to get in there with the right feeler gauge set. To set the rear one we may need to get one of those valve adjustment tools similar to this:
https://www.amazon.com/Baosity-Unive...05&sr=8-3&th=1
Edit: Specs for the valves are .08 mm intake, and .10 mm exhaust.