API SERVICE Best specification of oil.
 

What is the best type of oil to run in these bikes?. Mostly concerned about the anti friction agents and the clutch.
I am planning on using a 10w 40 conventional oil.

Use Rotella T4 if you want conventional oil, (T5 for semi synthetic, or T6 for full synthetic.) Great oil, inexpensive, and JASO-MA certified for wet clutches.

Ok. That works for me. Easy to find and not super expensive.