The KTM 250 EXC-F uses 5008 bulb size for both front and rear turn signal applications. The replacement chart covers 2017 through 2019 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The KTM 250 EXC-F uses the 5008 bulb in both the front and rear turn signal positions across the 2017-2019 model years.
The 5008 is an ANSI-standardized bulb type recognized in the United States and Canada, operating on a 12-volt electrical system.
It is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as turn signaling and braking, within the same unit.
The 5008 uses a BA15s bayonet base, which is a single-contact bayonet mount that locks into the socket with a twist rather than a threaded connection.
The 5008 is a lower-wattage variant of the 1156 bulb, sharing the same BA15s base type but drawing less power, which makes the two types not directly interchangeable despite their physical similarities.
Because the front and rear turn signal positions on the 250 EXC-F share the same bulb type, a single 5008 specification applies to all four turn signal sockets on the motorcycle.