Sorry Zombie, I neither understand what you mean in your first sentence, nor do I understand the bolt torque chart in your second sentence.
So how is international understandability for joe sixpack defined and determined? 
The torque is rated by the fastener. Meaning it's the bolt/nut size that determines how tight it should be. The way it works is, the threads slightly distort when properly torqued to "lock" that fastener in place. Too loose, and things fall apart. Too tight, and fasteners break.
If you are attaching two flat pieces of metal together w/ a 1/4 x 20 bolt, it will be the same torque rating as if you were attaching a carb to a manifold w/ that same bolt.
There are very few exceptions... Mainly on cylinder head bolts where a specific torque is met, and then another 1/2 turn of the fastener is required. This is not the case w/ Kymco engines.
All the torque settings can be found on-line using a fastener torque chart.
I hope this helps some...
