KTM put a lot of effort into smoothing out the motor. For starters, there’s a new cylinder head with a second balance shaft to reduce vibration. The intake valves run directly off the single camshaft, while the exhaust valves are actuated by a rocker arm. A new, more oversquare cylinder design with a bigger bore (up 3mm to 105mm) and shorter stroke (down 4.5mm to 80mm) lets the engine rev 1000 rpm higher. A new crank assembly features a more compact, lightweight, plain-bearing connecting rod holding a forged piston. The addition of a resonator chamber positioned directly after the new Keihin 50mm throttle body is equally important in controlling throttle response. All of these features, in conjunction with a new dual-spark ignition with different maps for each plug, have played a role in the motor’s newfound smoothness. Even the redesigned, lightweight muffler plays a role in added performance, as well as noise reduction.