Lambretta DUE50 Owner's Manual page 37

PRE-RIDE CHECK
INSPECT TIRES
Check if there are any foreign objects stuck in the
tire such as nails or screws. Check tires for cracks or
wear using the wear indicator. If the tire is damaged,
punctured or worn, it should be replaced before riding.
CHECK FRONT & REAR SHOCK ABSORBERS
Apply pressure on both front steering handle and seat
to check the function of front
and rear absorbers.
CHECK MIRRORS
Check that the mirrors are adjusted properly.