motorcyclist [motorcyclists](someone who rides a motorcycle) noun [UK: ˈməʊ.tə.saɪ.klɪst] [US: ˈmoʊ.tə.saɪ.klɪst]Both motorcyclists were wearing helmets. = Entrambi i motociclisti stavano indossando un casco.
motociclistanoun {m}
biker [bikers](person whose lifestyle is centered on motorcycles) noun [UK: ˈbaɪkə(r)] [US: ˈbaɪkər]He's a biker. = È un motociclista.
rider [riders](one who rides, see also: cyclist; driver) noun [UK: ˈraɪ.də(r)] [US: ˈraɪ.dər]John is a great motocross rider. = John è un grande motociclista.