KTM 640 Adventure License Plate Bulb Size

The KTM 640 Adventure uses a 12961 bulb size for the license plate light, with this specific bulb designation representing the replacement component across the model's production span. The replacement chart covers 1998 through 2008, documenting bulb specifications for the vehicle throughout that 10-year period.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1998-2008	12961

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

Other Locations

Additional Notes

The KTM 640 Adventure uses the 12961 bulb for its license plate light across all listed model years, spanning 1998-2008.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor.
The T10 designation refers to the bulb's tubular shape, with the number indicating a width of 10 millimeters.
This bulb uses a W2.1x9.5d wedge base, which is a capless design that relies on the glass envelope itself to make contact with the socket rather than a separate metal cap.
The 12961 operates at 12 volts and 5 watts, which is consistent with low-power auxiliary lighting applications such as license plate illumination.
The W2.1x9.5d base type is a standardized wedge fitting, meaning functionally equivalent T10 bulbs from other manufacturers sharing this base type are generally interchangeable with the 12961 in compatible sockets.