Document ID: chunk:federal_register_of_legislation:F2023C00136:reg:113:p18
Version: federal_register_of_legislation:F2023C00136
Segment Type: reg
Provision Reference: reg 113 (pt 18/21)
Character Range: 63430–66328

the case of (a) pair(s) of additional lighting units, they shall be installed so that their reference centre(s) are symmetrical in relation to the median longitudinal plane of the vehicle.
In the case of a single additional lighting unit, its reference centre shall be coincident with the medium longitudinal plane of the vehicle.
         6.2.3.2. Height: a minimum of 500 mm and a maximum of 1,200 mm above the ground.
         6.2.3.3. Length: at the front of the vehicle. This requirement is regarded as satisfied if the light emitted does not cause discomfort to the driver either directly or indirectly by means of the rear-view mirrors and/or reflective surfaces of the vehicle.
         6.2.3.4. In the case of two headlamps producing the principal passing-beam the distance separating the illuminating surfaces must not exceed 200 mm.
6.2.4. Geometric visibility
Defined by angles α and β as specified in paragraph 2.11. of this Regulation:
α = 15° upwards and 10° downwards;
β = 45° to the left and to the right for a single lamp;
β = 45° outwards and 10° inwards for each pair of lamps.
The presence of partitions or other items of equipment near the headlamp shall not give rise to secondary effects causing discomfort to other road users.
6.2.5. Orientation
         6.2.5.1. Forwards. The lamp(s) may move in line with the steering angle.
         6.2.5.2. The vertical inclination of the headlamp producing the principal passing-beam must remain between -0.5 and -2.5 per cent, except in the case where an external adjusting device is present.
         6.2.5.3. For headlamp producing the principal passing-beam with a light source having an objective luminous flux which exceeds 2,000 lumens, the vertical inclination of the headlamp shall remain between -0.5 and -2.5 per cent. A headlamp levelling device may be used to satisfy the requirements of this paragraph but its operation shall be automatic.[5]
         6.2.5.4. The requirement in paragraph 6.2.5.3. above shall be tested on the vehicle in the following conditions:
         Condition A (rider alone):
         A mass of 75 kg ± 1 kg, simulating the rider, shall be placed on the vehicle in such a way as to reproduce the axle loads declared by the manufacturer for this loading condition.
         The vertical inclination (initial aiming) of the headlamp producing the principal passing-beam shall be set, following the manufacturer's instructions, between -1.0 and -1.5 per cent.
         Condition B (fully laden motorcycle):
         Masses, simulating the manufacturer's maximum total mass, shall be placed on the vehicle in such a way as to reproduce the axle loads declared by the manufacturer for this loading condition.
         Before making the measurements, the vehicle shall be rocked three times up and down and then moved backwards and forwards for at least a complete wheel revolution.
         6.2.5.5.