I guess I don't quite get why a seemingly large majority on here is almost anti-2s. They're more fun! Lighter, less stuff to go wrong(though I don't ever hear much about problems with the 4s either) lighter, sound better, and lighter. In my experiences with riding with 1050 and 1100 yammies, they are usually only a gallon better at the pump than my gas-drinking 800 2s. I know, no $40 a gallon oil, but you do have to change it. I don't think there's really much difference on a cost basis. I know eventually I'll have no choice, because of environmentalist wackos, than to own a 4s. But for now, just waiting to see how the 2011 poo 800 holds up. Than an RMK Pro for me!
Just giving the old 2-strokes some self-esteem