The Bulb(12v3.4w,t10) is the lowest priced item on this Speedometer - Tachometer schematic.
The Suzuki SPEEDOMETER - TACHOMETER has twenty-seven products enlisted in the schematic.
Parts such as the Speedometer - Tachometer: Tachometer, Bolt, Cable Assembly,speedometer, Screw are included in the Gs250t 1981 (x) United Kingdom (e02) Speedometer - Tachometer parts fiche.