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 ...
The Screamin’ Eagle 131 engine combines the 4.5-inch stroke of the Milwaukee-Eight 114 engine with new 4.31-inch bore cylinders. Milwaukee-Eight Extreme Ported four-valve cylinder heads are CNC-ported ...