i suggest going down and watching some people take it... but you're a ways out so that's not the easiest thing for you.
weave around the cones or dots, make a U turn between two lines... gotta keep the tires in about a 2' track and the one part i found akward was where they have you accelerate, then slam on the front brake and they want you to make the front tire skid.
my bike had soft, weak brakes when i took the test and i rarely try to make the front skid intentionally... so it was going against all my normal riding instincts. had i been on the bike i'd had before the one i took the test on with firmer suspension and stronger brakes it would not have been a problem.
i don't think they want you doing endos either.
the regs say that you're supposed to show up with another licensed rider, but they never asked check on that or to check that the bike was insured. you could trailer the bike or haul it in a truck and work around that i guess, but they never checked.
if you have any problems understanding the tester, turn the bike off, remove your helmet and ask them to repeat the instructions. i had a tester with an attitude and an accent.
a small to mid sized dual sport will be a breeze to take the test on... with the possible exception of the skid the front part.
look at the pavement and that seems to be where they guys on new full dress harleys or Gold Wings dump the bike. lots of deep gouges in the pavement.
make sure the bike idles without needing to be revved up. make sure it's warmed up and that you remember to shut the choke off. if the bike dies and you have o put a foot down they'll either make you re do that section or wash you out and make you come back.