Preheat outdoor gas grill.
Alternately thread cubed chicken pieces, pineapple, and peppers on eight 6-inch skewers; set aside.
In a small bowl combine vinegar, extra virgin olive oil, soy sauce, sesame oil and water; whisk until thoroughly combined.
Remove 1/4 cup of the sesame-soy marinade and set the rest aside.
Brush the 1/4-cup marinade over kabobs.
Reduce the heat on the gas grill to a medium.
Place kabobs on grill rack, directly over heat.
Cover and grill for 12 to 14 minutes, or until chicken is tender and cooked through, turning once halfway through grilling.
Remove kabobs from grill and transfer to a serving plate.
Shake the reserved dressing and drizzle over kabobs or serve on the side.