The motorcycle in cinema-Purple Rain.

Wiki:

Purple Rain is a 1984 feature film directed by Albert Magnoli and written by Magnoli and William Blinn. Prince stars in this movie, which was developed to showcase his particular talents. The film was very successful earning nearly US$100 million at the box office.
A sequel titled Graffiti Bridge, was released in 1990.

Prince plays "The Kid", an aspiring and talented Minneapolis musician with a difficult home life. He meets a beautiful singer named Apollonia, and they become involved in an untidy romance. The plot centers on Prince trying not to repeat the pattern of his abusive father (Clarence Williams III) and keep his band, The Revolution, and his relationship with his girlfriend, together. His main antagonist is fellow musician Morris Day and his group The Time. Excluding Prince and his on-screen parents, almost every actor in the movie uses his/her actual name for his/her character.

Pict Via: imcdb

Via: answers

"Prince's bike in the film is a Honda 1981 400 automatic, It had Comstar wheels and fairng by Kutter. The seat is one off custom made affair with hot pink velour inserts custom made in Drag Specialties upholstery deaptment. The sissy bar was a standard Drag spec. item. The handlebars are the 6 bend variety.

One of the films two stunt bikes remains and is on display at Paisley Park Studios in Chanhassen, Mn"