44 tooth sprocket (rear) / effective diamter Ø 110 mm Diameter inner hole Ø 30 mm shoter chain (high speed tuning) with 39 link, 9,5mm width, 310mm length Tuning Set makes the electric scooter about 5 km/h faster Attention: for the model SXT 500 EEC, the sprocket at the motor must be replaced too!
