According to bike shop the 1999 ninja has about 115 hp. the ninja 600 platform hasn't changed that dramatically as far as specs in the last 10 years I'm sure this is an accurate figure plus or minus 5 hp or so an easier way to compare bikes is to use the torque ratings because most manufactures provided this on their spec sheets. http://www.bikeshop.ro/motorcycles/motorcycle-selling-clasified-add-second-hand-kawasaki-ninja%20600-from-1999-104838.html this guy has no clue what he's talking about lol, bikes haven't changed in ten years? lol well apparently he's never actually owned one or ever heard of fuel injection, aluminum perimeter frames, or probably helmets for that matter. there is no way that a 99 600 was pushing out those kind of ponies, actual is around 95-99 rwhp on a 99 zx6r with about 40ftlbs of torque, and 116rwhp on an 06 zx6r (636cc)with 52.5ftlbs of torque, and 110 rwhp on an 06 zx6rr (599cc) with 49ftlbs of torque.
The horsepower of a 1985 Ninja 600 is 75 Max
108hp
About 38 horsepower for dual-carburetor models of the VLX / VT-600.
28 maybe 30
i say it would be at least 500 horsepower
about 120
28 maybe 30
105!!!!
110 horsepower at 12,500 RPM
10w40
600
125 hp