Chicken: In large bowl, whisk together maple syrup, soy sauce, chili sauce, sesame oil and garlic. Remove 2 tbsp to small bowl and set aside.
Add chicken to remaining maple syrup mixture; toss to coat. Arrange on parchment paper–lined rimmed baking sheet. Roast in 425°F oven, turning once, until juices run clear when thickest part of chicken is pierced, about 35 minutes.
Brush with reserved maple syrup mixture; sprinkle with sesame seeds. Broil until browned, 1 to 2 minutes.
Crispy Chickpea Salad: While chicken is roasting, toss together chickpeas, 2 tsp of the oil, 1 tsp of the lime juice, the chili sauce and half each of the salt and pepper; spread in singlel layer on greased rimmed baking sheet. Roast in 425°F oven, stirring occasionally, until crisp and golden, about 20 minutes.
In large bowl, whisk together maple syrup and remaining oil, lime juice, salt and pepper. Add arugula and red onion; toss to coat. Top with chickpeas. Serve with chicken.