I'm in the market for a 50cc scooter. What are the differences between a 50 two stroke and a 50 four stroke as far as performance is concerned? My experience on small scoots is limited. I owned a 50 2S 10 years ago but test rode a FLY 4S yesterday and was amazed at the poor acceleration. I once rented a Kymco People (2S I believe) and with two up it was blowing past all the other scooters on Block Island with single riders and quickly hit 45 or so on the speedo. Are 2 strokes faster? Would a Ruckus have the same performance as the Piaggio Fly 50 4 stroke? Would a 2 stroke Zuma be faster than either the Ruckus or the Fly? Thanks all for the help?