Husqvarna TE 310 2010 Guide D'utilisation Et D'entretien page 176

ADJUSTMENT OF HEADLIGHT (TE- SMR)
When checking the proper orienting of headlight, inflate tires
at right pressure, sat a person on the saddle and place the mo-
torcycle perpendicular with its longitudinal axis 10 meter (33
ft) from a wall or screen. Then trace an horizontal line equal to
the height of headlight center and a vertical one in line with its
longitudinal axis.
If possibile, execute this operation in a shadowy place.
When the low beam is on, the upper boundary limit between
dark and lit zone should be 9/10 th of headlight center from
groud.
82
Adjust the preadlamp aiming by turning screw (1) to lower or
lift the high beam.
1