I would use 10w30 Synthetic in your air cooled engine.
on the right side of the engine above the water pump. it is held in by 2 bolts
It could be your water pump seal
How do you put oil in Kawasaki 250 four wheeler
10w40
Motor Oil
110mm standard
What kind of oil dose a 03 kawasaki 636 take
20:1
directions for changing oil on a kawasaki 2002 1500 classic motorcycle ? Dave Downs
next to where you pour the oil in about 2"to the right remove 2 screws and a plate and there it is
10w40
10w30