Bike Insurance South America HELP

[ReeceNZ]

Hello friends,
Me and my girlfriend are from NZ and are planning a 6 month motorbike trip two-up through South America later this year. We are slowly learning what planning that requires.

We're new to motorbiking so its a big learning curve, we think at this stage we will get a v-strom 650 or maybe a transalp.

But, the question I have is in relation to motorbike insurance while travelling. We are a bit worried about spending all the money on a bike and gear and then having it stolen or having an accident, so we want to insure it on the way.

Is this possible?
Is it the way to go?
Some info I have read says you buy insurance at the border of each country. Has anyone done similar?

Thanks in advance.