Which coil? The new, or the old one. Also, this isn't TI, it has the Ignitech CDI unit installed. Also, the coil worked just fine long before this. I didn't install the CDI, the previous owner did. All I did was remove the airbox, clean and rebuild the carbs. This problem just arose because I disconnected the wiring for the coils, and my marking tape fell off. Then the left coil overheated when trying to figure out how the coils wired up again (before I knew it was an ignitech CDI).