movie title? 80's movie I think?

I can't remember what the name of this movie is. I remember watching it when i was a kid. I'm thinking 80's movie, possibly even early 90's. Don't know for sure. anyway all I remember about the movie is that there's a mom and 2 sons. the oldest son was always fighting with his moms boyfriend. he was beating up the mom and there was a chase seen with a full size chevy blazer and kid on his bike I think.

anyone know it?