Mix soy sauce, oil, wine, sugar, curry and pepper flakes. Add the pork and toss to coat well. Cover and refrigerate for at least 2 hrs tossing occasionally.

Prepare grill. Position oiled rack 4-6 inches above fire.

Remove pork from marinade and pat dry with paper towels. Reserve the marinade. Thread pork onto skewers. Grill turning frequently and bushing with reserved marinade until cooked through. About 20 minutes