as i am in armenia now, i thought i would be a good idea to update some info..
the bordercrossing from iran into armenia was not exactly the fastest i ever experienced. the visa was available for 40 dollars (but i met a couple who only paid 30, just one week before). a carnet was not needed but i had to pay 21000drams for inporting the bike. everything included, like roadtax because armenian roads belong to one of the best in the world ;-). anyway you can not get away with it. got a receipt and i heard other people paying the exactly same amount of money..
if its really late you can stag in meghri, and stay with eliya, a b&b, good value and superfriendly people..
then gorgian embassy in yerevan is issueing visa for a month for 6600 drams or around 14 dollar. so much cheaper then the bible describes (40 or even 80 dollars for people with a consulat at home). got it in one day.
petrol is offcourse more expensive then iran, but still okay, costing 340 drams or around 60 eurocent...
yep, thats all for now, if you have any other questions, just ask !