The perception of "the best" air-cooled motorcycle engines can vary among enthusiasts and riders based on personal preferences, intended use, and other factors. However, there are several manufacturers known for producing notable air-cooled motorcycle engines. Here are a few well-regarded manufacturers:
Harley-Davidson: Harley-Davidson has a long-standing reputation for producing air-cooled V-twin engines. These engines are known for their distinctive sound, torquey performance, and iconic styling.
BMW Motorrad: BMW has produced air-cooled boxer engines for many years, which have gained a loyal following. These horizontally opposed twin-cylinder engines are recognized for their durability, smoothness, and distinctive aesthetics.
Ducati: Although Ducati has transitioned to liquid-cooled engines for most of its models, they have produced notable air-cooled engines in the past. Ducati's air-cooled L-twin engines were renowned for their performance, character, and the signature desmodromic valve system.
Moto Guzzi: Moto Guzzi is another manufacturer famous for its air-cooled engines. The Italian company has utilized transverse V-twin engines with a longitudinal crankshaft configuration, providing a unique and recognizable style. These engines are often praised for their reliability and distinctive character.
Royal Enfield: Royal Enfield is known for its classic motorcycles with air-cooled engines. The company has a rich heritage and produces single-cylinder engines that deliver a retro riding experience with a focus on simplicity and reliability.
It's worth noting that advancements in technology and stricter emissions regulations have led many motorcycle manufacturers to transition from air-cooled engines to liquid-cooled designs. Liquid-cooled engines offer better heat dissipation, increased performance, and improved efficiency, which has become the industry standard in many segments. However, air-cooled engines still hold a special place in the hearts of motorcycle enthusiasts who appreciate their simplicity, aesthetics, and the unique riding experience they provide.