Welcome to the Q&A Forum

Hi, I run a site that is currently doing very well in google for the terms that we want.  We are 1,2 or 3 for our 4 targeted terms, but havent been able to jump to number one in two categories that I would really like to. In looking at our site, I didn't realize we have a TON of duplicate content as seen by SEO moz and I guess google.  It appears to be coming from our forum, we use drupal.  RIght now we have over 4500 pages of duplicate content. Here is my question:  How much is this hurting us as we are ranking high.  Is it better to kill the forum (which is more community service than business) and have a very tight site SEO-wise, or leave the forum even with the duplicate content. Thanks for your help.  Erik