Alright to use diffrent stock coils?

[projectxs650]

I'm just double checking here, i know some years have two coils, while others had just one. is it alright to use either or, as long as its wired properly? or is it year specific?

 

[5twins]

It has to do with the type of ignition you're running. Points ignitions need a higher resistance coil of 4 or 5 ohms or the points will burn up quickly. Electronic ignitions use a lower ohm coil of like 2 or 3 ohms. So, you need to match the coil to the ignition.