Preheat the pellet grill to 350 degrees.
Brown the hamburger meat in a large heat-safe pot or skillet over medium heat. Break the meat into smaller pieces using a wooden spoon and cook until the meat is no longer pink, about 8-10 minutes.
Using a slotted spoon, remove the ground beef from the pot and set it aside. Reserve two tablespoons of the grease and return the pot to the heat.
Add the onion and bell pepper. Sauté, stirring often, until the onion and bell pepper are tender, about 8-10 minutes.
Return the ground beef to the pot. Add the cans of baked beans, mustard, brown sugar, barbecue sauce, syrup, salt and pepper. Stir until the ingredients are combined and the mixture is heated through.
Layer the chopped bacon strips over the top of the beans.
Smoke the beans on the pellet grill for one hour or until the internal temperature of the beans reaches 165 degrees F, the bacon is browned and the beans are bubbling.