Honda TRX500FE1 Owner's Manual page 143

5. Remove the oil fill cap/dipstick (4) from the front crankcase cover
and wipe it clean.
6. Insert the oil fill cap/dipstick without screwing it in, then remove
the oil fill cap/dipstick and check the oil level. The oil level should
be between the upper level mark (5) and the lower level mark (6)
on the oil fill cap/dipstick.
7. If the oil level is near or below the lower level mark, then add the
specified oil into the fill cap hole, up to the upper level mark on
the oil fill cap/dipstick. Do not overfill.
8. Reinstall the oil fill cap/dipstick.
9. Install the oil check/fill door.
NOTICE
Running the engine with an improper oil level can cause serious
engine damage.
LEFT SIDE
(4) oil fill cap/dipstick
Engine Oil & Filter
(4)
(5) upper level mark
(6) lower level mark
(5)
(6)
Servicing Your Honda 133