Place bacon in a large, deep skillet. Cook over medium high heat until evenly brown. Drain, crumble and set aside.
In a small bowl, mix together mayonnaise, sugar and vinegar to make the dressing.
Bring a large pot of lightly salted water to a boil. Cook tortellini in boiling water until they float to the top (or if you like them more tender)you can cook them for a 1-2 minutes longer. Drain the noodles.
In a large bowl, combine tortellini, broccoli, bacon, grapes, raisins, sunflower seeds and red onion.