The KTM 500 EXC-F uses a 232 bulb size for the front turn signal and a 5008 bulb size for the rear turn signal. The replacement chart covers 2017 through 2022 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 two bulb types specified for the KTM 500 EXC-F turn signals are the 232 and the 5008, both of which conform to ANSI standards applicable to the US and Canadian markets.
The 232 is a festoon-style bulb, meaning it is cylindrical in shape and held in place by contact at each end rather than by a base socket. It uses an SV8.5 base and operates at 12V with a 3W power draw.
The 5008 is a single-filament bulb with a BA15s bayonet base, which is a single-contact bayonet mount. It operates at 12V and is a lower wattage variant of the more widely known 1156 bulb.
Because the 5008 is a lower wattage variant of the 1156 and not electrically identical, substituting a 1156 in place of a 5008 would introduce a higher wattage draw than the circuit was specified for.
The front turn signal on the KTM 500 EXC-F uses the 232 bulb for the 2020-2022 model years and the 5008 bulb for the 2017-2019 model years, indicating a change in bulb type between the 2019 and 2020 model years.
The rear turn signal specifications cover the 2017-2019 model years only, with the 5008 bulb specified across all three of those years.
The festoon 232 and the bayonet-base 5008 are physically and electrically incompatible with each other, as they differ in both mounting type and wattage, making them non-interchangeable.
The BA15s designation on the 5008 indicates a single-contact bayonet base with a 15mm collar, which is distinct from the BA15d double-contact variant. Using a BA15d bulb in a BA15s socket is not a compatible substitution.