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As the owners of the FZ6/2004 already knows, due to the new regulations only one of the headlights is on at the low beam.
Even it is a good one, it would have been better if both headlights was on.
Don't worry… It can be done with almost no cost and with 100% safety way !
I inform you that the FZ6 is already designed with both headlights on at the low beam and it is already equipment with the dual bulb (H4) at the left (as you siting on the bike) headlight and almost with all the wire needed !!!
Just is missing only about 70-80 cm of wire from the connector to the bulb.
There are 2 explanations for this. Either the same bike is sold to other countries outside EU with both headlights on, or either it was designed this way and when the new regulations came, it was easier and cheaper to just turn off the one headlight at low beam rather than redesign the whole system.
In any case it is very easy, cheap and safe to have both lights on at low beam.
The only thing you have to do is to wire the empty H4 bulb's connector to the connector in which wires from the headlight switch at the left handlebar ends.
You are looking for a GREEN wire ENDING at the connector.
This connector is located in the bike's frame just in front and below the battery.
This is all the difficulty involved as this connector is not in a accessible location and you have to remove fairing sides, tank, battery, air filter box etc… to gain access to it.
BUT it is very easy to just make a hole to the plastic that covers the wires coming from the switch, find and cut the GREEN wire and connect it to the headlight. This will take up to 3 minutes without remove one bolt !. The only problem going that way, is that you will be not sure if you have cut the correct wire until is done.
At my bike WAS the green wire, but there is no guarantee that all Fazers using the exact same colors…Do it at your own risk or measure with a multimeter before cut anything…
The whole mod needs only 1meter of wire and 1-2 connectors - total cost below 1 euro !
Whatever way you choose the results are great.
Both headlights are now on at the low beam, and the high beam works the same way as before the mod.
You will notice more light in front of the bike at night, but the most important is that you will be easily seen by car's drivers even at the brighter day, and this is called safety.
At the same time you can upgrade the bulbs using something like Osram Silverstar or Philps Vision-plus (you will need one H4 and one H7 unit) for astonishing results, as I did.
If you don't want to spend much money upgrading the bulbs, you can try and replace only the H4 unit. The H7 bulb that FZ6 have from factory it is a very good one and there is not much gain by changing it .
And a warning for them that will find that it's easyer to just fed the one headligt by giving power from the other
DON'T DO THIS
The low filament of the H4 bulb MUST be going off when you use the high beam. The only way to achieve this is to power the H4 bulb from the connector or from the green wire caming from the handlebar switch as described above.
If you power the headlight from the other, then at high beam you will have both filaments on at the left headlight and for sure this will causes problems of too much heat and not enough electric power...
Good luck …