Suzuki Motorcycle LT500R QuadRacer Tail Light Bulb Size

The Suzuki Motorcycle LT500R QuadRacer tail light requires a 12821 bulb size for proper installation and operation. Data for the specified component covers the range from 1987 to 1990.

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 Type	Shop
1987-1990	12821	Check Price

Bulb Specifications

Description	Type	Shop
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12821	Check Price

Other Locations

Additional Notes

The Suzuki Motorcycle LT500R QuadRacer uses the 12821 bulb for its tail light across the 1987-1990 model years.
The 12821 is a Philips part number designating a miniature wedge bulb in the T10 form factor, which refers to a tubular bulb roughly 10mm wide at its widest point.
The bulb operates at 12 volts and draws 5 watts, placing it in the low-power range typical of tail light applications where continuous illumination is required without significant electrical load.
The W2.1x9.5d base type is a wedge-style connector, meaning the bulb is held in place by tension from the socket rather than by a bayonet or screw mechanism.
The W2.1x9.5d designation specifies the exact wedge base geometry, where 2.1mm refers to the wire contact width and 9.5mm refers to the base length, making socket compatibility dependent on both figures matching the housing.