Mine melted as well on the left side. Since I have no access to a recall claim, there were just 2 options for me:
1. Use LED bulbs as the temperature at the connector pin is much much lower vs halogen. (I am using this now)
2. If u want continue using Halogen bulbs, get the Ceramic Connectors headers to replace the melted ones.
Now, why the original melts is explained by Yamaha due to difference in thermal expansion. The connector is made of brass which expands faster than the steel on the H7 bulb at the same hot temperature. At the operating Halogen temperature, the brass connector becomes a loose fit. This causes an air gap to form which causes current to jump (arching). The arching temperature is really high and is the cause for the melting.
Using LED bulbs, it will not reach that hot temperature for the air gap to form.
These days, with better technology, u can get a LED H7 without those wires sticking out or with a giant heatsink sticking out. It's a drop in replacement and allows the dust cover to be fitted in like an ordinary H7 halogen.
LED H7 bulbs without bulging heat sink and wires sticking out.
In case u need a good working reference, Novsight In-Line N63 H7. This has a mini fan to keep the LED chips from overheating and cutting short the lifespan. A bad example that doesn't fit the Tenere is this model Auxito GFM H7. It's base diameter that contains the fan is just too large to fit the Tenere's lamp housing. What's great the Novsight (and also Auxito) is that is non-polarity. Plug in either + or - , it will still light up.
There are some without the Fan, and I suspect that if it gets too hot, it will drop the brightness for self preservation. They are cheaper too, much cheaper.