[JerryHawk250]

The 400 can be a good beginners bike. Like others have stated. Respect the bikes power and don't be a squid. It will have more than enough power that will keep you satisfied for a few years. Even the 650 can be a good beginners bike. You can install the throttle restrictor screw on the Ninja 650 like they do in Australia which limits it to 40 hp until you get some experience on the bike. Although my Vulcan 650 has the same engine, i find the engine has way more power than i will ever need but not so much power that it will be uncontrollable. It's kind of the sweet spot on power.