The KTM 500 EXC front turn signal bulb size measures 232 and 5008, while the rear turn signal bulb size measures 5008. The replacement chart covers 2012 to 2013 vehicle 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 500 EXC turn signal system draws from two bulb types across its 2012-2013 model years: the 232 and the 5008, both of which conform to ANSI standards applicable to the US and Canadian markets.
The 5008 is a single-filament bulb with a BA15s bayonet base, operating at 12V. It is considered a lower wattage variant of the 1156 bulb, sharing the same base configuration but drawing less power.
The 232 is a festoon-style bulb with an SV8.5 base, rated at 12V and 3W. Festoon bulbs are cylindrical in form and mount by contact pressure at each end rather than through a socket base.
The BA15s bayonet base of the 5008 and the SV8.5 festoon base of the 232 are physically incompatible with each other, meaning the two bulb types are not interchangeable regardless of voltage compatibility.
On the 2013 KTM 500 EXC, the front and rear turn signals use different bulb types: the front requires the 232, while the rear requires the 5008. Substituting one for the other would not be possible without modifying the socket.
The 2012 500 EXC uses the 5008 in both the front and rear turn signal positions, making its front socket specification different from that of the 2013 model year.
Because the front turn signal socket changed between 2012 and 2013, a 232 bulb sourced for a 2013 front position would not fit a 2012 front socket, which is designed for the BA15s bayonet mount of the 5008.