Sterling 125: mono DOHC, 124,9 cc, 12,75 HP / 9,5 kW (7500 rpm), 15 Nm (5500 rpm), 95 kg.
Sterling 230: mono DOHV, 229,5 cc, 14,10 HP / 10,5 kW (6600 rpm), 18,3 Nm (4500 rpm), 98 kg.
Sterling 125: mono DOHC, 124,9 cc, 12,75 HP / 9,5 kW (7500 rpm), 15 Nm (5500 rpm), 95 kg.
Sterling 230: mono DOHV, 229,5 cc, 14,10 HP / 10,5 kW (6600 rpm), 18,3 Nm (4500 rpm), 98 kg.