When taking a bike into Japan, costs are reasonable PROVIDING it is pre - 2004 (i.e. around £1,600 per bike for local testing/modifications and registration). Post 2004, the costs are nearer £6,000 to put on the road there.
I understand that for Australia, all asbestos must be removed form the bike, so typically all brake/clutch friction components and even gaskets must be replaced with items certified as asbestos free.
This might not help much for New Zealand, however I doubt that the process would be low cost in any event and any losses on sale/repurchase locally might be insignificant compared to the cost of import and registration.
The Company who handle your shipping for household goods should be able to obtain a vehicle specific quote for you, for which the vehicle's VIN number etc. will be required. Certainly in my case Abels (abels.co.uk) have been really helpful. Our contact at Abels is Rebecca Pritchard (RebeccaPritchard@abels.co.uk).
I hope that this might just help!