Mine had a vin plate on it so I was able to prove it had been on the road before and it was just a standard revin/rerego
A nz vin plate isn't needed, just the frame number can be used, they will probably fix a vinplate to it at the inspection
BUT
If yours was never on the road you might have some issues, you may be able to get a letter from Suzuki stating that that model was road legal, and get it legal that way. Some guys on here have done similar with old hondas I think. You may also have to prove where the bike came from I.e a list of which frame numbers were imported into nz from suzuki, and that might be a hard one
Mine was actually registered previously in Japan and imported a few years later, there's only about 5 registered ones that I recall seeing in the data from ltsa, so they may have all been imported used (there's also a couple of sp200 in nz, they were the official road legal version, they have red plastics)