if you look in your operators manual it tells you where the plugs are and the amount of oil each takes,you fill the engine through the dipstick tube and oil filter is on the back of the engine accessed from passenger side,the filler plug on the the rear diff is smaller than the front diff,only takes one liter between front and rear diffs,i buy the yamalube kit and diff oil from my dealer and has some of the plug washers with it.