yes I do need the headlight mod
My MOT tester warned me I could damage the electrics by doing the dual headlamp mod
The tester is incorrect if the modification is done correctly because the on/off switch is only ever switching on or off 2 bulbs maximum like it does without the modification.
However he is correct if the modification is done incorrectly
Without the modification Headlight on the right and dim on the left are on together when switched to Hi and the left dim is on when switched to Lo
With the correct modification the left and right dims are on together when switched to Lo and the headlight on the right and left dim are on when switched to Hi.
If both dims are on the combined wattage is 110watts (2 *55watts dims)
If Headlight and dim are on the combined wattage is 115watts (60watt head and 55watt dim)
Many modified the light incorrectly and ended up with both filaments of the H4 bulb on at the same together and this caused overheating of the bulb and wiring as you had 60w+55+55=170watts being powered via the on/off switch
The correct modification is done by connecting the spare green wire in the left hand switch to the spare connector on the H4 bulb. Follow the wiring from the left hand switch group to the block connector in the electrical box under the tank. You will see one of the connector blocks which has a green wire going in on one side and nothing coming out of the other side. The is the wire you require to connect to the spare connection on the H4 bulb.
Unfortunately I have no pictures to show you so I hope this makes sense