First of all I'm presuming that the oil change is for a KX500 (year?), secondly you're not actually changing the engine oil (again presuming your bike's a KX500) you are changing the transmission oil (engine oil is the oil you mix in with your gas), thirdly again assuming you have a KX500 (year?) the capacity should be 800ml (0.8L) and the recommended weight oil would be any 10W30, 10W40, 75W or 80W oil.