Yamaha YFM350S Owner's Manual page 268

1. Engine oil filter cover
3. Engine oil filter element
1. Couvercle du filtre à huile de moteur
3. Élément du filtre à huile de moteur
4. Joint torique
1. Tapa del filtro de aceite de motor
3. Elemento del filtro de aceite de motor
4. Junta tórica
2. Bolt (× 3)
4. O-ring
2. Boulon (× 3)
2. Perno (× 3)
8-19
NOTE:
_
Skip steps 5–9 if the oil filter element is not being
cleaned.
_
5. Remove the oil filter cover by removing the
bolts, and then remove the oil filter element.
6. Clean the oil strainer and oil filter element
with solvent.
7. Check the O-ring for damage and replace it if
necessary.
8. Install the oil filter element and O-ring.
NOTE:
_
Make sure the O-ring is seated properly.
_
9. Install the oil filter cover by installing the bolts,
and then tighten them to the specified torque.