Chinese engines = new rule book. I was very disappointed that the OHV rocker cover on my TORO (Lonchin) engine didn't have a rubber gasket for easy valve lash checks. That fact and the overapplication of factory sealant just added an hour to a 10 min job.My old JD F510 with a Kawasaki motor in it never even say anything about adjusting the valves for maintenance. My reason for never doing it I guess.....
Gotta read the online manual.