Thieves broke the steering lock on a motorbike before riding off on it.
The vehicle was parked on Grove Lea Walk, Pontefract, at around 8.10pm last night (Wednesday).
Its owner saw a group of men pushing it down the street before breaking the lock and riding off on it.
Anyone with any information should contact Pontefract and Knottingley neighbourhood police team on 101.
Alternatively, call Crimestoppers, anonymously, on 0800 555111.