What type of oil do I use in a ktm 600 desert enduro?

What type of oil do I use in a 1987 ktm desert enduro?

KTM Enduro 600 is classified as an offroad motorcycle with a 4 stroke engine.
The oil approved for use is Motorex, fully synthetic, SAE 10W-60, but you can use any brand of fully synthetic SAE 10W-60.

Resource:

4 stroke engine oil uses