I almost got hit by a bus that obviously did not see me, it had a yield -sign. So I decided to do something to the headlight that is rather dim by default. Rewiring makes all the difference to the brightness and the cost was about 20 EUR in total. What you need is 2 meters of 4 mm2 wire, a fuse box and a 15A fuse, two relays (I used https://goo.gl/C1CrOo
), some heat shrink tube, soldering wire, a socket for H4 bulb, abiko connectors and cable sleeve. See the attachment for connections.