7 borders road trip
 

hi, next year i will embark on the 7 borders road trip.
singapore - malaysia - thailand - cambodia - vietnam - laos - myanmar - and back to singapore

if any of you guys can give me some info/advice/tips for crossing any of the borders, please do let me know.

insurance?
international driving license?
does laos require you to have 250cc or above bikes to get in? is it like that for the other countries?
visa?
administrative stuff?
anything else?

thanks in advance! :)

I would advise to post this in the forum of Southern Asia