At the heart of every great Harley-Davidson motorcycle is the engine -- here we've got 10 of the greatest of all time.

Few things satisfy motorcycle enthusiasts more than hearing a beautiful engine, whether it's cruising the interstate or tearing up the track, and few motorcycle engine sounds are as instantly ...

The Harley-Davidson 103 engine is often described by riders as being faster than earlier Twin Cam versions like the 88 or 96, along with having more features like ABS and an oil cooler. That said, ...

MILWAUKEE— Robert Miranda’s motorcycle, nicknamed Loki, roars when he revs the engine. To him, it’s a beautiful sound, part of the city’s motorcycle heritage that began 115 years ago with the founding ...

Promising more power, more comfort and more control, Harley-Davidson has unveiled a new engine called Milwaukee Eight, plus improvements in its motorcycles’ suspension systems. But don’t worry. The ...