motorcycle
The Italian word for 'motorcycle' is 'motocicletta'. It is a feminine noun in Italian. Therefore, you would use 'la' for 'the' and 'una' for 'a' when referring to 'motocicletta'. For instance, 'la motocicletta' means 'the motorcycle', and 'una motocicletta' means 'a motorcycle'.
I like to ride the motorcycle.
This sentence is stating that the subject enjoys riding their motorcycle, which could be a hobby or a preferred mode of transportation.
I forgot the motorcycle keys.
This sentence tell us about the subject having forgotten their motorcycle keys. This could have happened at any point in the past.
The motorcycle is very fast.
This sentence is describing the speed of the motorcycle, implying that it's able to reach high speeds.