Ive had two guys tell me their 600's have gone 280 km/hr+. One has a 2000 CBR 600 F4i, and he says hes been 290 on it b4..its all stock. The other, 2002 R6 and says he had it up to 295 before. On bikez.com, most 600 super sports top speeds are about 250-260. Somethins not right! THat mean my 97 Sixxer can go 280-290?