Hi, looking for an 80's breakdance movie, Beings with a teenager/teenagers painting grattiffi on some rooftop,

Later in the movie, dance crews perform on stage, there is on act where a crew have a large boombox prop in the background.

Thanks...

The only 80's break dance movies I remember (kinda) are Breakin' and Breakin' 2 .

Its not it but thanks :)

http://www.imdb.com/title/tt0086946/
I think this may be the movie you are looking for...

Sorry the name didn't post BEAT STREET

Could it be wild style Wild Style (1983) - IMDb