what tank is this?

Here is some more pictures of thsi set.The picture of the turbobike is around 1980-82
it was built by the owner of the turbo bike and then stolen down in europe somewhere.
I buyed the tank,seat and fairing from him,
It was a cafe racer back in 1980. So the other pictures is how my bike looked back then.
So if somebody can tell me what brand this is then i will be happy,because i want to complete it again.Rune

The picture of the turbo bike was to big to load so i will try to resize