I took my msf class recently and those 250's had nothing for me i figure a 500 wouldnt be much better. im 6'5 around 350. Now considering i weigh twice as much as a 600 was meant for. Would i tame a zx6r,r6, or gsxr600 down a bit? i know i would have to get springs for my weight. big guys, fat asses, and people that ride with passengers :lol speak up!