How Much Power Does The New 2018 Kawasaki Ninja 400 Make?

We strap Kawasaki’s Ninja 400 to our dyno to see what an extra 103cc does for it

Kawasaki’s littlest Ninja is a cornerstone of motorcycling, and for 2018 it’s been overhauled from top to bottom. We reviewed the bike in detail in this First Ride article, but we were only able to estimate the bike’s power with our butt dyno while at the press launch. Now, however, we’ve run it on an actual dynamometer, and the results are impressive.

The Ninja 400 puts 43.4 hp to the ground at 9,900 rpm, backed up by 24.6 pound-feet of torque at 8,250 rpm. That's real-deal, rear-wheel horsepower, folks, and the new bike's curves tower over the outgoing 300's output.

What did you expect from a 103cc (more than 30 percent) displacement bump?Ari Henning

The 2018 bike obviously benefits from more displacement, but there are other things that contribute to the increase in power including higher-compression pistons, new cams, and a totally revised intake and exhaust system. If you want to know more about the bike’s many updates (and of course how it is to ride!), make sure you check out the link at the top of this article.


PRICE $5,499 (as tested)
ENGINE 399cc liquid-cooled parallel twin
MEASURED HORSEPOWER 43.4 hp @ 9900 rpm
MEASURED TORQUE 24.6 lb.-ft. @ 8250 rpm
FRAME Tubular-steel twin spar
FRONT SUSPENSION Showa 41mm fork; 4.7-in. travel
REAR SUSPENSION KYB shock adjustable for spring preload; 5.1-in. travel
FRONT BRAKE Nissin two-piston caliper, 310mm disc with ABS
REAR BRAKE Nissin two-piston caliper, 220mm disc with ABS
RAKE/TRAIL 24.7°/3.6 in.
WHEELBASE 53.9 in.
SEAT HEIGHT 30.9 in.
MEASURED WEIGHT 371 lb. wet (ABS model)