I owned mine for 6 months, and maybe had it flat out in all 4-6 gears 3-4 times. The 9 will do power wheelies in 2nd gear, nice eye opener... 160 km/h on one wheel
I'm saying that in the real world, and not the bragging one can you truly utilize the 9 motor to its full potential. The 7 will suit
me better
then again, I never do wheelies, my tires last me 20 thousand miles and my bike never needs valve adjustments because I'm easy on it... :