When I pushed up the rpm, the 113 cubic inch pushrod V-twin responded with an immediate surge down low, then a healthy midrange whomp and a horsepower kick at the top end. In any gear, the Stratoliner's torque came on at will, and the motor pulled eagerly, if not hurriedly-gotta remember that stroke is over four-and-a-half inches. According to Star, the engine on all three trims is identical, though the gearing may have been tweaked on the Strat. Either way, you're still sure to encroach into license-threatening territory long before the tach ever reaches redline (5700 rpm)in top gear. A beefy 2-into-1 exhaust system spits out a satisfyingly, bass-y note.