23-05-20, 10:00 PM
Just to add a wee bit. There was a post from His Dudeness in January - ignition switch circuit - which had a wiring diagram for headlight upgrade using 2 relays to convert to using 2, H4 bulbs. The wiring diagram was supplied by limax2, and is easy to follow, even me

The only thing to think about is making a holder to convert H1 side to H4. I used the rubber boot from behind headlight to make a ring using fibre glass resin. Then using Dremel ,cut in a H4 bulb shape into hard resin. You can get a spring clip from Halfords to then hold a H4 bulb. Then enlarged the H1 hole in headlight to accept the H4 bulb. I used more resin to hold my new holder to rear of reflector.
In the post it says "lights are 10 times better" , I would say more than 10 , even with standard H4 Bulbs. I have spots on my bike too. Since doing this to headlight I have only used the spots when it gets foggy

I also done away with that silly side light bulb and put in two LED 501 bulbs from Halfords. Ive attached a couple of pics. Hope they work.
With the wiring diagram from limax2 it makes this job a lot easier, and gives the Fazer headlights that work. I do quite a lot of night riding and this makes it a lot more enjoyable .