Can I use synthetic 10W-40 motor oil in my motorcycle?

yes you can but make sure its for motobikes their is a difference and the wrong stuff will make your clutch slip i think it should say without moly i was at the bike shop today with my clutch in hand owner said he has been hearing alot af complaints about synthetic oil alot af guys are saying its to slick and the clutch just slings it out cauing the cluth to slip what problems are you having with bike i found mine ran bad on gas with alot of ethonal it coused my valves to click it took awile to figure this out but it was the cause