Suzuki Motorcycle GV1400 Cavalcade Turn Signal Bulb Size

Suzuki Motorcycle GV1400 Cavalcade rear turn signal bulbs utilize a P21W size, designated as 1073. The replacement chart covers 1986 through 1989 model years with corresponding bulb size specifications.

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

Rear Turn Signal

Years	Bulb Size
1987-1989	P21W
1986	1073

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.	P21W
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	1073

Other Locations

Additional Notes

The P21W bulb follows the ECE standard used in Europe and worldwide markets. It operates at 12V with a 21W output and uses a BA15s bayonet base with a single filament, making it a dedicated signalling bulb rather than a dual-function unit.
The 1073 bulb follows the ANSI standard used in the US and Canadian markets. It shares the same 12V operating voltage and BA15s bayonet base as the P21W but draws only 13W, classifying it as a lower-wattage variant of the 1156 bulb.
Both the P21W and 1073 share the BA15s bayonet base, which is a single-contact base with a 15mm collar. Despite this shared base type, the wattage difference between the two bulbs (21W versus 13W) is a relevant fitment consideration.
The Suzuki Motorcycle GV1400 Cavalcade used the 1073 bulb for the rear turn signal in 1986, while the 1987-1989 model years used the P21W, reflecting a change in bulb specification across the production run.