Looking at the spec to set-up the headlamp. It is complex. I have recently heard of Motorcyclists failing the MSVA test on the dipped headlight so it is important to get this one in the bag. Some guidance from the DVLA government website is below, and Delboy a popular motorcycle enthusiast simplifies the process in his video above.

European type – check on dipped beam

European type lamps have an asymmetric dipped beam pattern with:

Check the position of the centre of the area of maximum intensity (‘hot spot’)

• a horizontal cut-off on the right
• a wedge of light above the horizontal towards the left, known as the ‘kick up’

European type lamps might have a European approval mark, usually a letter ‘E’ in a circle or an ‘e’ in a rectangle.

For a European type lamp to pass, you must make sure:

• any ‘kick up’ is visible on the screen
• the beam image horizontal cut-off is between 0.5% and 2.75% below the 0% horizontal line (for headlamps with centres at 850mm or less from the ground)
• the beam image horizontal cut-off is between 1.25% and 2.75% below the 0% horizontal line (for headlamps with centres more than 850mm from the ground)
• white light does not show in the zone formed by the 0% vertical and 0.5% horizontal line

Diagram 1. Criteria for European beam headlamp aim

British American headlamp – check on main beam

Check British American type headlamps on main beam if they have:

• a symmetrical main beam pattern with a central area of maximum intensity (‘hot spot’)
• a circular lens which might be marked with a figure ‘1’ followed by an arrow indicating the direction of dip

You must fail a British American type lamp if its ‘hot spot’ centre is any of the following:

• above the horizontal 0% line
• below the horizontal 2% line (for headlamps with centres at 850mm or less from the ground)
• below the horizontal 2.75% line (for headlamps with centres more than 850mm from the ground)
• to the right of the vertical 0% line
• to the left of the vertical 2% line

For a British American type lamp to pass, you must also make sure the brightest part of the image moves downwards when the lamp is dipped.

Diagram 2. British American headlamp – Main beam image

British American headlamp – check on dipped beam

Check British American headlamps on dipped beam if they have:

• an asymmetric dipped beam pattern which when correctly aimed has a flat-topped area of high intensity extending above and parallel with the horizontal 0% line on the nearside
• a circular lens marked with the figure 2 (it might also have an arrow showing the direction of dip)

You must fail this lamp if the upper edge of the ‘hot spot’ is:

• above the horizontal 0% line
• below the horizontal 2.75% line

You must fail this lamp if the right-hand edge of the ‘hot spot’ is:

• to the right of the vertical 0% line
• to the left of the vertical 2% line

Diagram 3. British American headlamp – Dipped beam image

Bennetts guide for headlight assessment is in the video below.