SOUPY Sales would have loved his memorial yesterday at the Riverside Funeral Home. Freddie Roman, Joe Franklin and Kenny Kramer — who inspired the character played by Michael Richards on “Seinfeld” — were among those who paid their last respects. One of Soupy’s two rock musician sons, Tony or Hunt — our source didn’t know which — recalled his dad’s advice: “Be true to your teeth, and they won’t be false to you.” Professor Irwin Corey had to be removed from the podium after his eulogy turned into a diatribe about health-care reform, in which he insisted that Soupy — along with Odetta, Eartha Kitt and Miriam Makeba — died prematurely because of inadequate treatment. And a female rabbi told the crowd that Soupy’s parents, Irving and Sadie Supman, the only Jewish family in Franklinton, NC, owned a dry-goods store and sold sheets to the Ku Klux Klan.