Howdy, Slider
Yup, you are right with the zero thing. Bad proof-reading on my part.
Not sure about difference with the bike size bit.
Registration over here (NSW) is a bit weird. Under 300cc is cheap. Over 300cc, no matter what it is, is the same price.
Insurance, on the other hand...
If you are planning to tour for a while, it is probably worth looking at buying and then selling at the end.