No, not all Harley-Davidson motorcycles have V-twin engines, but the majority of their models do. The V-twin engine is the most iconic and traditional engine configuration used by Harley-Davidson, and it has been a defining feature of their motorcycles for many years. However, Harley-Davidson has also produced motorcycles with other engine configurations in their lineup.
In addition to V-twin engines, Harley-Davidson has manufactured motorcycles with:
Revolution Engine: Harley-Davidson introduced the Revolution engine, a liquid-cooled V-twin engine, in their V-Rod line of motorcycles. These engines had a different design compared to the air-cooled V-twin engines used in most other Harley models. The V-Rod models were in production from 2001 to 2017.
Milwaukee-Eight Engine: Introduced in 2017, the Milwaukee-Eight engine is a new generation of V-twin engine used in select Harley-Davidson touring models. It features a dual-cooling system, improved performance, and reduced vibration compared to previous models.
Street Engine: Harley-Davidson's Street series motorcycles, including the Street 500 and Street 750, are powered by a liquid-cooled, fuel-injected, V-twin engine designed specifically for these models.
It's worth noting that the V-twin engine remains a significant part of Harley-Davidson's heritage and is still commonly used in their cruiser and touring motorcycles. However, the company has made efforts to diversify their engine offerings to appeal to a broader range of riders and meet evolving market demands.