The T-REX 16S is powered by a 1.6-liter in-line 6-cylinder engine supplied by BMW Motorrad. Developing 160 horsepower at 7,750 rpm and 129 lb-ft (175 Nm) of torque at 5,250 rpm, the engine is ...

Some engines hum. Some whine. Others roar. But Harley-Davidson motorcycle engines rumble. Harleys produce a low, deep-throated, somewhat syncopated vibration many aficionados describe as "potato-po ...