Buy bike in North America and then drive it through South America?
 

Hello everyone!

I am planning an off road/camping trip through the Andes mountain range in South America. So I would like to be able to cross boarders with the same bike, and buy/register the bike where I start my travel (North or South America). The bike will probably be a small, light, beginner-friendly, used, common/well-known enduro.

It seems possible to buy and register a bike in SA, but it's not clear to me which would be the best city/country (if there is such) to do it. People most often mention Chile, also Argentina and Brazil, it seems to me. Are there clearly differences regarding prices, availability, reliability/trustworthiness of the dealers, bureaucratic hassle?

I wouldn't mind spending some travel time in advance through North and Central America.
How advantageous is it to buy and register the bike in (any place in) North America instead, regarding the above mentioned aspects?

Thanks for sharing your experience!

Cheers,
Ettore