Non-Harley motorcycles are commonly referred to as "non-Harley Davidson motorcycles" or simply "non-Harley motorcycles." However, there are numerous brands and models of motorcycles available from various manufacturers that are not affiliated with Harley-Davidson. Some popular non-Harley motorcycle brands include Honda, Yamaha, Kawasaki, Suzuki, BMW, Ducati, Triumph, KTM, and many others. Each brand offers its own range of motorcycles with different styles, features, and performance characteristics.