This is the 739th most frequent Turkish word.
motosiklet
Motorcycle.
Here, "motosiklet" refers to the general concept of a motorcycle as a vehicle or activity.
Motosiklet sürmek benim için bir tutku.
Riding a motorcycle is a passion for me.
In this sentence, "motosiklet" represents a specific motorcycle that is the subject of the question.
Bu motosiklet yeni mi aldın?
Did you recently buy this motorcycle?
In this context, "motosiklet" is used as an adjective modifying "yarışı" to specify the type of race.