Increasing headlight power

Many people think the headlight beam has insufficient power. However, changing the lamp to higher power (halogen) type will also increased current flow. This current produce large voltage drop, so luminosity may not increase as much. Besides, cables and light fuse may be overheated.
In that case, further modifications (wiring, additional relay) are needed. See the following image for details (sent by Christos Zervos)

Wiring diagram and directions to use (GIF 34KB)

On the older models (until 1993) reflector has no overheating problem from the increased lamp power. We don't know what happens to the newer models