on the right side of the motor there is a cap with twwo bolts take that off and theres th oil filter it will have a oil line running to it
A Honda 400ex is rated to hold 5 quarts of motor oil. This includes the oil stored in the oil pan and the filter which are replaced during an oil change.
On a 400ex the engine and transmission share the same oil. So when you change the oil in the engine you are changing the transmission oil as well. That is why you need an ATV or motorcycle oil designed for wet clutches.
GN4 Honda oil only.
about 2 qt.
1.9 us quarts
2.3 quarts
2.6 quarts
2.6 Quarts
4.5 quarts with oil/filter change.
2.6 Qts. without oil filter change 3.2 Qts. with oil filter change
10w-40 G4
Well the best time to change your oil filter is when you do the oil change to your car. Which is every 3 months.