There are more questions than answers
 

Right where to start.
I live in the UK but I do own a motorcycle that resides in New Zealand
I would like to tour Australia via motorcycle nd was wondering if it is feasible to ship my NZ bike to Australia for a few months ride around then sell it. Or ship it back to NZ
Thanks Martin

Shipping to/from OZ ... yes ... quite a few do it. Not cheap mind you.

Selling in OZ is a different problem ... tax on import, compliance with Australian Design Rules, rego/mot ... not usually worth the hassle.

Thanks I will look into cost of shipping as I have a bike fully kitted bike with luggage. Do you need a carnet from NZ to OZ? What insurance would i need? Would i have to register is to an OZ adress?

Yes you still need the carnet. No you cannot sell or even gift the bike the bike to someone in Australia. Even if you abandon the bike here, you'll lose the money on your carnet and the carnet issuer will come knocking on your door. Can a non NZ resident get a carnet?
Quite honestly for all the hassle that Australia puts you through for a short stay its better to just buy a hack bike and sell it when you leave. Say you buy at $5000 and for a quick sale for $4000 that "loss" is probably close to what it would cost you to bring a bike over from NZ and back again, get a carnet, get insurance, get customs clearance, get a roadworthy inspection (not in NSW), get an overseas registered vehicle permit (not in NSW). I defy anyone to do that in less than a week and maybe even more if you hit some bureaucrat who likes making things hard for tourists - but will make the problem go away for $$$.

I have a well set up DL1000 Vstrom available for sale and buy back in the bikes for sale section.