As the highest-displacement model in Husqvarna’s enduro lineup, the FE 501 is also the most powerful. By how much? Cranking out 44.5 hp at 8,400 rpm on the Dirt Rider dyno, the FE 501 makes 8 hp more than the FE 350, 0.7 hp more than the TE 300i, and 3.8 hp more than the TE 250i. For torque, the FE 501 produces 31.6 pound-feet at 6,900 rpm, which puts it at 9.8 more than the FE 350, 4.2 more than the TE 300i, and 4.1 more than the TE 250i. There is a slight but brief dip in the horsepower and torque curve from 3,500 rpm to 3,600 rpm, then the FE 501 climbs aggressively until 4,000 rpm before continuing on a mostly linear trajectory until it begins leveling off at 7,600 rpm on the horsepower curve.