1. Make glaze: Combine honey, soy sauce, zest, lime juice, chili powder and crushed red pepper in a pan. Bring to a boil over medium-high heat. Reduce heat to medium and cook, stirring, until slightly thickened, about 5 minutes. Let cool slightly.
2. Preheat a gas grill on high heat for 10 to 15 minutes with lid closed. Thread pork, mango and peppers, alternating, on 8 large metal skewers, leaving some space between pieces. Place on a baking sheet and season generously with salt and pepper. Brush with glaze. (Discard any leftover glaze.)
3. Oil grill. Place kebabs on grill, reduce heat to medium-high, close lid and grill for 6 minutes. Turn kebabs and grill until peppers are lightly charred and pork is cooked through, about 6 minutes longer.