Suzuki Motorcycle DR650S front and rear turn signal bulbs utilize a P21W size across all applications. The replacement chart covers 2007 through 2019 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Suzuki Motorcycle DR650S uses the P21W bulb type for both its front and rear turn signals across the 2007-2019 model years covered in these specifications, with no variation between positions or years.
The P21W is an ECE-standardized bulb, meaning it conforms to the Economic Commission for Europe's lighting regulations, which are widely adopted across international markets beyond Europe.
P21W bulbs operate on a 12-volt electrical system and draw 21 watts, which is the standard wattage for single-filament automotive and motorcycle turn signal applications under the ECE framework.
The P21W uses a BA15s bayonet base, where "BA" denotes a bayonet cap fitting, "15" refers to the 15mm base width, and the lowercase "s" indicates a single-contact configuration, distinguishing it from dual-contact variants such as the BA15d.
Because the P21W is single-filament, it serves a dedicated signalling function only, unlike dual-filament bulbs that combine two functions such as braking and running light in a single unit.
The identical P21W fitment across both the front and rear positions on the Suzuki Motorcycle DR650S means a single bulb type covers all four turn signal housings on the motorcycle.
The BA15s bayonet base is not interchangeable with wedge-base bulbs or screw-base bulbs, so substitutions must match the bayonet fitting specifically to seat and make proper electrical contact.
Replacement bulbs rated at voltages or wattages other than 12V/21W would fall outside the P21W specification and could affect turn signal flash rate, as motorcycle flasher relays are typically calibrated to a specific load.