The Buell M2 Cyclone front turn signal uses a 5008 or 232 bulb size, while the rear turn signal requires a 5008 bulb size. The replacement chart covers 1997 to 2002 model 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 5008 is the most frequently specified bulb across the Buell M2 Cyclone turn signal positions. It is an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12V, and is a lower wattage variant of the 1156.
The rear turn signal position on the Buell M2 Cyclone uses the 5008 bulb across all listed model years from 1997-2002 without exception.
The front turn signal position also uses the 5008 bulb for 1997-1999 and 2001-2002, making it the dominant fitment for that position as well.
The 2000 model year front turn signal on the Buell M2 Cyclone is the sole position specifying the 232 bulb, which is a festoon-type with an SV8.5 base, rated at 12V and 3W.
The BA15s base of the 5008 is a single-contact bayonet fitting, which is not interchangeable with dual-contact bayonet bases such as the BA15d. Substituting an incompatible base type would result in improper fitment.
The festoon form factor of the 232 bulb differs structurally from the bayonet-base 5008. The two bulb types are not interchangeable, and the 2000 front turn signal housing is designed around the festoon format rather than the bayonet format used in all other positions.
Because the 5008 is a lower wattage variant of the 1156, the two share the same BA15s base but differ in wattage output. Using a higher-wattage 1156 in place of a 5008 may affect circuit load and flash rate in turn signal applications.