I want to display a pie chart of pageviews for my site, but there are a few outlier pages I do not want included.
Is there a way to exclude those sites from the pie chart?
You can use Advanced Segments to exclude that pages and put together that chart after applying that segment (which excludes those outlier) pages.
It is done as follows (this example is for excluding visits where "time on page" > 20 minutes, but you can change it to suit your needs):
That new segment is automatically applied to the report and graph.