This Wiring Diagrams is applicable for Suzuki GN400. As I searched in the net, I found that this motorcycle model was first launched in 1980 and stop production in 1984. The 1980 GN has overall length 2110 mm, overall width 849mm and overall height 1200mm. It has wheelbase 1410 mm and dry weight 140kg. Air-cooled 396cc SOHC single cylinder, 2 valves, 27 hp was installed as the machine at that time.
You can download the Suzuki GN400 Wiring Diagrams here or click on the picture.