Preheat the tandoor oven to moderately hot. Thread the marinated chicken pieces onto skewers at least 3/4 inch apart. Coat the chicken pieces with the remaining oil, and keep the skewers on a tray to collect the drippings. Roast the chicken for 6 to 8 minutes, basting with the marinade at least twice. While cooking, make sure that the chicken pieces do not touch the sides of the tandoor.
Remove the chicken pieces from the skewers, cut all the pieces into halves, and serve.