Welcome Torque Addict!
What a way to have to inaugurate your bike on it's shakedown cruise!

Seems like the rain always knows when you HAVE to get home doesn't it?
No help with any diagnosis I am afraid but I too questioned the noises from the motor after I got mine home and got a few hundred on it.
The good folks here told me they aren't exactly a quiet motor and it's part of the character of the Triumph, which I have found to be true.
Mine has about 2600 miles on it at present and I've been hearing new sounds as it continues to age, one being the reeds in the intake (can't think of what they are called at the moment) setting up a sound like a vibration buzz at certain rpms when going through town.
Hopefully yours is just normal engine noise and you've got a sound motor.
Again, welcome to the forum!