G'day all!!!!

Thought it best that I stop lurking around here and actually say hello!

I current live on the Gold Coast in Australia. I have been riding road bikes for 10 years and dirt bikes for about 20 years now. Like most of you here the idea of riding a motorbike across another country is nothing short of a spectacular lifetime dream! So, I'm doing it next year.

I'm flying into Santiago, Chile on the 10th March 2014 and will be buying a motorbike there. Then, the plan is to head south before their winter really hits in and work my way back up and around the Eastern Sea Board. I have allowed myself 4 1/2 months for this trip, no idea how far I will get, may even head into Central America if I have time.

Most questions that I have had I've managed to find answers for already on here but every now and then one comes up that proves a little more difficult to answer. So at this stage I just have a couple for you guys.

Is Argentina the only country that I need to pre-pay and organise a visa for? Does every other country provide you with a visa on arrival to their border? Are there any issues that I should be aware with crossing borders with a motorcycle?

I'm trying to find a device that will track my entire journey via GPS that I can translate back onto a map (ie Google Maps etc) when I return? Has anybody used anything like this or can recommend anything?

Anything fundamental that I should know? Even if you think it is silly throw it up here anyway, include all aspects of the journey!

Thank you in advance everyone for your advice so far!

Matt