Non U.S resident buying in California for S.A trip

[realmc26]

As an Australian, from what what I have read its no real issue to register the bike with the address as either your hotel/hostel or even the bike dealer.

My understanding is you get a temporary slip from the DMV which will allow you to cross the border into Mexico.

My question is do I then have to get the title sent to me somewhere in Mexico for me to then leave mexico into Guatamala and beyond?

I dont want to wast time in the U.S waiting for the title to get sent out so would rather be on my way into mexico.

Wondering what the safest method of getting it sent to Mexico and how long it would take?

Thanks