I have noticed a few times, on take off or into a climb that the 152 will start making a sharp left or right rolls. Attempting to resolve always results in an over correction to the other side.
I can eventually correct, but having flown a 152, I never had this happen in real life, so a bit puzzled why it's happening in the sim.
This is the only aircraft I have this issue with, so I'm not sure what the solution.
It sounds as though you are using stock / unadjusted weather? Dig up the 'Hunter Instability' thread in the old forum:
(that link is to the 152 thread, there's a further link I posted in there to the Hunter. All worth a read).
Hope that helps,
I've tried it both with stock 'clear skies' and AS16. However, according to the thread that you pointed me to, my settings in AS16 might have been too aggressive.