Probably one of the truest statements that I've ever read. Years ago I gained a bit of a reputation locally as a Gx Honda guru, ( before all the Chinese stuff got about)people used to ask me what my secret was in sorting out so many problem engines and I said there was none, simply pop the head off,de coke, grind the valves in, new plug and air filter plus fresh fuel and then 99% of them would be sorted. It was rare that I had to delve deeper,usually took less than two hours from start to finish.