Part Number | Description | Models | Years |
| Bulb pack | A | All |
| Headlamp bulb 6 Volt, 36/36 Watt | Alternative | Pre 1949 |
| Headlamp bulb 12 Volt, 36/36 Watt | | |
| Headlamp bulb (Pre Focus) 6 Volt, 30/24 Watt | | 1951-63 |
| Headlamp bulb 6 Volt, 24/24 Watt, N/A use 170 | DU42/MU42 | 1936-48 |
| Headlamp bulb 6 Volt, 30/30 Watt, N/A use 170 | SSU700P | 1949-50 |
| Headlamp bulb, 12 Volt, 50/40 Watt | | |
| Headlamp bulb, Halogen H4, 12 Volt, 60/55 Watt fits light unit 555,309A | | |
| Headlamp bulb, Halogen H4, 6 Volt, 60/55 Watt. This bulb is bright but draws too much current to be used for long periods. Fits light unit 555,309A |
| Headlamp bulb, 12 volt 60/55 Watt P45T base H4 Halogen | | |
| Pilot bulb 6 Volt, 3 Watt | DU42/MU42 | 1936-48 |
| Pilot bulb, 6 Volt, 3 Watt MES (Miniature Edison Screw) | | |
| Pilot bulb, 6V, 3W wedge fitting bulb | | |
| Pilot bulb, useful for people who ride with lights on all the time, 6V 8W | |
| Pilot bulb, in headlamp 6 Volt, 3 Watt | | 1949-58 |
| Pilot bulb, 6 Volt, 4 Watt | | |
| Rear lamp bulb for original, not reproduction, lamps 6V 6W | MT110, 480 | 1924-52 |
| Rear lamp bulb for reproduction lamps 6 Volt, 21/5 Watt | MT110 | 1924-49 |
| Rear lamp bulb for reproduction 480 lamps with offset pin | 480 | 1924-50 |
| Rear lamp bulb for reproduction 480 lamps with parallel pins | 480 | 1924-50 |
| Rear lamp bulb 6 Volt, 21/5 Watt | 525, 564 | 1953-54 |
| Rear lamp bulb 12 Volt, 21/5 Watt | As 384 | |
| Speedo bulb 6 Volt, 2 Watt | | |
| Speedo bulb, 6 Volt, 4 Watt | | |
| Speedo bulb, 12 Volt, 3 Watt | | 1938-58 |
| Panel lamp bulb (for DC40) 6 Volt, 3 Watt | DC40 | 1932-50 |
| Instrument bulb ‘pinched base’, 6 Volt, 1.5 Watt | | |
| Instrument bulb ‘pinched base’ 12 Volt, 3 Watt | | |