Suzuki Motorcycle LT-Z250 QuadSport Z Tail Light Bulb Size

The Suzuki Motorcycle LT-Z250 QuadSport Z tail light requires a P21/5W bulb size for proper operation. Available data covers the specific range from 2004 through 2009.

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
2004-2009	P21/5W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W

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Additional Notes

The Suzuki Motorcycle LT-Z250 QuadSport Z uses the P21/5W bulb for its tail light across the 2004-2009 model years.
The P21/5W is a dual-filament bulb, with one filament rated at 21 watts for braking or turn signal functions and a second filament rated at 5 watts for running light functions.
The bulb operates on a 12-volt electrical system, consistent with standard automotive and powersports applications.
The P21/5W uses a BAY15d bayonet base, which features two offset pins at different heights to ensure correct orientation during installation and prevent incorrect filament assignment.
The P21/5W is governed by ECE standards, a regulatory framework recognized across Europe and numerous other markets worldwide.
The BAY15d base is not interchangeable with the BAY15s single-filament bayonet base, as the latter lacks the offset pin configuration required for dual-filament operation.