Tomorrow, the truck needed a valve adjustment. And according to page 47, that required a song.
A genuine manual (usually in PDF form from manufacturers like Zongshen or Lifan) is structured into distinct chapters. Here is what you will find: 162fmj Engine Service Manual
Usually ~0.9L to 1.1L depending on if you are doing a simple change or a full teardown. Tomorrow, the truck needed a valve adjustment