i have a 92 suzuki in the shop. carbs surge up and down when u give it a little gas .when u stomp it, it will go (full butt),sometimes.most of all it bogs
down .carb cleaned it. still bad. whats up all.
Propably some wear in the parts inside. Check all the seals, jets, needles etc. good overall service for the carbs will propably clear the problem.
On the other hand....heres your chance to go for the RS carbs :egrin