YZF R1 Go Kart
http://www.youtube.com/watch?v=iSmxaORvBQI
GSXR Go Cart - 1100cc GoKart!!
http://www.youtube.com/watch?v=2Xv76qiJFJg&feature=related
Turbo Kart at 100mph
http://www.youtube.com/watch?v=Ar4dtYBlZ8s&feature=related
Painful Go Kart Crash...