This is the 12353rd most frequent Polish word.
motocyklem
"Motocyklem" means "motorcycle" in instrumental case in Polish.
Instrumental case used to denote the means of transportation (motorcycle).
Jechałem motocyklem do pracy.
I rode a motorcycle to work.
Instrumental case used to indicate the method of transportation (motorcycle).
Spotkaliśmy się z grupą podróżującą motocyklem.
We met a group traveling by motorcycle.
Incorrect usage attempt; the genitive or another case should be used here instead, but "motocyklem" would denote a method or association depending on context.