In a small bowl, combine the sugar, soy sauce, lime juice, ginger, cayenne pepper, curry powder, garlic, and ginger.  Whisk to combine until the sugar dissolves.  Set aside 2 Tbsp of the marinade for grilling.

Place chicken in a gallon sized zip-lock bag. Pour the marinade over the chicken.  Place in the fridge to marinate for at least 4 hours, or overnight is best.  Turn the bag over halfway through the marinating process.

Grill for 5-10 minutes on each side depending on the thickness.  During the last few minutes of cooking brush a the reserved 2 Tbsp of marinade.