ok on the right side of my engine by the clutch cover is a little twist off knob kind of thing for me to put oil in right? what kind of oil goes in there, and the drain bolt at the bottom of the bike drains that oil right? on my crankcase side isnt there another bolt that can drain oil? what kind of oil is that and how do I refill that. basically besides the oil you put in your gas, theres only 1 kind of oil you put into your bike right? and theres only 1 place to put it?