Mix together the vegetable oil, chipotle and sauce, smoked paprika, honey, oregano, cumin, garlic, lime zest and juice, 2 teaspoons salt and 1/4 teaspoon pepper in a small bowl. Rub some under the skin of the chicken breasts and thighs, and then all over the outside of the chicken. Let sit at room temperature for 30 minutes.
Prepare a grill for low indirect heat: For gas grills (with 3 or more burners), turn all the burners to medium-high heat; after about 15 minutes turn off one of the middle burners and turn the remaining burners down to low. For charcoal grills, bank one chimney starter-full of lit and ashed-over charcoal briquettes to one side of the grill. Set up a drip pan on the other side to avoid flare-ups. (Be sure to consult the grill manufacturer's guide for best results.)
Place the chicken breast-side up on the indirect side. Cover and cook, rotating the chicken periodically, until an instant-read thermometer inserted in the thickest part of the thigh (avoiding the bone) reads at least 165 degrees F, 1 hour and 30 minutes to 1 hour and 40 minutes. (If using charcoal, you might have to add more charcoal during cooking.) Let the chicken rest 20 minutes before carving.
Meanwhile, increase the grill to medium-high heat. Drizzle some oil on the scallions and sprinkle with salt and pepper. Grill until softened and darkly charred in spots on all sides, just a few minutes. At the same time, warm up the tortillas on the grill, about 1 minute per side; stack grilled tortillas and wrap in foil to keep warm.
Serve chicken with warm tortillas, charred scallions, lime wedges and salsa.
All grills are different and you know yours best. Cooking times may vary, so adjust as needed.
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