Thanks for the info folks, really appreciate your time. We had a pretty awful run through this border so I thought I may as well answer my own question for the next poor sucker who finds this on Google looking for the same thing.

All in all it took us 4 hours and was our worse crossing yet. I hope this helps.

1. Get there early!
The import folks seem to take a long lunch from 12 - 3. Don`t forget to move your watch forward another hour in both Bolivia and again in Argentina.

2. You need insurance!
I had to exit from Bolivia and enter Argentina, walk into town and buy insurance ($23 US) before I could import my bike. Perhaps you can buy online prior to arriving at the border but I didn`t have any luck doing this with my terrible Spanish.

3. Prepare to wait!
When we arrived at the border, the Bolivian police escorted us to the front of the long line to get our exit stamps. Unfortunately you just have to line up with everyone else for your entry stamp into Argentina. There must have been over 100 people with only 1 customs officer processing passports. It took forever...

So....

1. Exit Bolivia
2. Enter Argentina (Passport stamp)
3. Get insurance in Argentina
3. Give Bolivian aduana your Bolivian bike import papers
4. Import bike into Argentina

We have loved our time here so far, it was all well worth the hassle.

Good luck and safe riding.....

Andy