My wife has taken ownership of the ST2 while I use the 848. The ST2 is a much nicer bike to ride than her much newer BMW F800ST anyway. On trips out she has the HID bi-xenon headlight switched on as is the rule here in France. A couple of times she has told me over the intercom that the voltmeter is only reading 12.6 volts, so I know that there is not much charge going into the battery. As I always ride at the front (women can’t navigate) I have noticed that the sharp dip beam cut off in the headlight does not really do much for visibility. Both problems have been sorted with yet another headlight design.
In this design there is a circular LED “angel eye” as a daytime running light, A conventional side light for parking with the headlight switch in the first position and the HID dip on the second position. When the parking light or headlight is switched off the “angel eye” switches off. This way it can throw more light in all directions for the daytime to make the bike more noticeable and does not stay on with the lights at night so as to avoid dazzling oncoming drivers. A 30 watt LED light is fitted inside the ring to provide a headlight flash function. as there would be none without the dip beam being on otherwise.
The ST2 is now very noticeable during the daytime from the front. The voltmeter is showing 13.9 volts at tick-over so we know that the battery is charging, and the daytime running light is only consuming about 5 watts. It is wired through a 1 amp fuse in a spare position in the standard fuse box.
I am not sure if I should make videos and take photos as it is some effort when I am not sure that there are many ST2s and ST4s out there with owners wanting to modify the lights, if I am wrong and there is someone then let me know and I’ll go and document it.