i started on a Suzuki ER 50. that thing was SLOOOWWW. all my friends had 50's but mine was the slowest so i made up for it with my riding. in the year i rode it i dropped it about half a dozen times. to know the limits you need to push them.
it was better than my 10 speed and it was my own transportation so i couldn't complain.
i quickly upgraded to a 125 then a 600.