Combine the beef with the bulgoki sauce and marinate for 1/2 hour in the refrigerator.
Meanwhile, combine the cabbage, carrot, bell pepper and onions in a bowl.
In a separate bowl combine the vinegar, sugar, sriracha sauce, soy sauce and sesame oil.
Heat 1 Tbsp. vegetable oil in a wok or large sauté pan over medium high heat. Add the meat and cook, stirring frequently, until the meat is cooked to your desired doneness.
Toss the cabbage mixture with the dressing.
Distribute the vegetables and meat evenly between four warm flour tortillas. Fold in the ends and roll up burrito style.
Cut in half and serve with extra bulgoki sauce for dipping.