Harley-Davidsons are special. Aside from their unique "potato-potato" exhaust note, they stand apart from most motorcycles mainly due to their single-pin crankshaft design and their belt final drives.

Despite the complexity of modern vehicles, they still use technologies that have been a part of humanity’s toolbox since The Holy Roman Empire. Pulleys are believed to have been used in ancient ...

Over-tensioning shortens not only the life of V-belts but also that of the sheaves, electric motor, and driven equipment bearings. In extreme cases, it can even bend or break a motor shaft.

If you’ve been considering buying your first ebike — or perhaps your second or third — chances are you’ve come across some models equipped with a belt drive instead of a traditional chain. But what ...