I ride mine in the rain quite a bit but don't have rust like that on the lower part of the head. I do have the rust inside the turn signal holders though. If it was stored outside and ridden in the rain I guess it could rust.
I just looked at mine again and where the vin number is etched into the head, it has some surface rust on it (inside the numbers)
I'd ask for a better picture of that spot if it isn't close enough to inspect personally.
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