Honda Motorcycle PS250 Big Ruckus Turn Signal Bulb Size
Honda Motorcycle PS250 Big Ruckus front turn signal bulb size 1034 and rear turn signal bulb size P21W, 1073 are specified in this replacement chart. The chart covers 2005 to 2006 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 Honda Motorcycle PS250 Big Ruckus uses three distinct bulb types across its turn signal positions and model years: the 1034, the P21W, and the 1073.
The 1034 bulb is a dual-filament type rated at 12V and 21/5W, built to the ANSI standard for the US and Canadian markets, and fitted with a BAY15d bayonet base.
The BAY15d base on the 1034 is an offset dual-contact bayonet mount, which physically prevents substitution with single-filament bulbs that share a visually similar base style.
The 1034 is a variant of the widely used 1157 bulb, meaning it shares the same base type and general construction while differing in its exact electrical output.
The 1034 serves as the front turn signal bulb for the PS250 Big Ruckus across both the 2005-2006 model years.
The rear turn signal position changed bulb types between model years: the 2005 model uses the 1073, while the 2006 model uses the P21W.
The P21W is a single-filament bulb rated at 12V and 21W, built to the ECE standard used in European and international markets, and fitted with a BA15s bayonet base.
The 1073 is also a single-filament bulb with a BA15s bayonet base, rated at 12V and 13W, and is classified as a lower-wattage variant of the 1156 under the ANSI standard.
Although the P21W and the 1073 share the same BA15s base type, their wattage ratings differ significantly at 21W versus 13W, which affects their interchangeability in practice.
The 1034 uses a BAY15d base, while both the P21W and 1073 use a BA15s base, making the front and rear turn signal bulbs on the PS250 Big Ruckus physically non-interchangeable with one another.