Fill out your profile, it helps with questions like this to know what year bike you have.
The '12 model year bikes had a smaller gauge wiring harness for the headlights. It spec'ed out as just barely adequate for the current, but headlight plugs were melting and Yamaha eventually did the recall. I don't recall exactly what year range applied to the recall, but it has long been done in most cases. If you don't have a '12 model year Super Tenere, odds are it's not part of the recall. If you do have a '12 bike, your dealer should be able to confirm if the recall was done or not. It simply involved a new harness for the headlights that had thicker gauge wire and better plugs. Lots of people, including myself, replaced the oem headlight bulb plugs with ceramic H7 plugs sourced off ebay, which solved the problem of melting the plugs and having a headlight go out. Sometimes the bulb would be taken out too, other times the bulb was fine.
When the recall was done on my bike, I did save my ceramic plugs and did notice that the old wiring was heat affected, turning the black wire more gray, for example, but I did not see any other indications of melting.
Hope that helps. It's also possible that you simply got some bad bulbs. It happens. Look for indications that your bulb plugs are melting, and see if the connectors inside the plug are tightly gripping the bulb terminals. Some squeezed them with pliers to get a better fit to the bulb prong terminals, which seemed to improve things at the time, until the plug melted.
