Suzuki Motorcycle GSX1300R Hayabusa Turn Signal Bulb Size

Additional Notes

• The two bulb types specified across all listed model years of the Suzuki Motorcycle GSX1300R Hayabusa turn signal positions are the 12496 and the PY21W. Both operate at 12 volts, making them electrically compatible with the motorcycle's standard electrical system.
• The 12496 is a halogen bulb designated for specialty applications and is identified by a Philips/Osram part number rather than a universal ECE or SAE standard code. Its 12-volt rating aligns with typical motorcycle electrical systems.
• The PY21W follows the ECE (Economic Commission for Europe) standard and is recognized globally. It is a single-filament amber bulb rated at 21 watts, fitted with a BAU15s offset bayonet base. The offset pin arrangement of the BAU15s base prevents incorrect installation by ensuring the bulb can only be seated in one orientation.
• The front turn signal position on the GSX1300R Hayabusa uses the 12496 across the 2013-2019 model years, while the PY21W appears in the front position for the 2008, 2011, and 2012 model years.
• The rear turn signal position shows a less consistent pattern between the two bulb types across the listed years, with the PY21W and 12496 alternating across multiple model years rather than following a single continuous specification.
• Because the front and rear turn signal positions do not always share the same bulb type within a given model year, the two positions on the GSX1300R Hayabusa are not universally interchangeable across all listed years.
• The BAU15s base of the PY21W is distinct from the more common BA15s base. These two base types are not physically interchangeable, and substituting one for the other without a compatible socket is not possible.
• The 2009 model year specifies the 12496 for the front turn signal and the PY21W for the rear turn signal, representing one of several years where the front and rear positions carry different bulb specifications simultaneously.