As someone who is 5.6 feet tall (approximately 167 centimeters), you should be able to ride the KTM 125 Duke comfortably. The KTM 125 Duke has a seat height of around 32.87 inches (approximately 835 millimeters), which is relatively low and accessible for riders of various heights.
With your height, you should be able to plant both feet firmly on the ground when seated on the KTM 125 Duke, which provides stability and confidence while maneuvering the motorcycle at stops or low speeds. Additionally, the KTM 125 Duke is known for its nimble and agile handling, making it suitable for riders of varying heights.
It's always recommended to test ride a motorcycle before making a purchase to ensure that it feels comfortable and fits your specific riding style and preferences. By test riding the KTM 125 Duke, you can evaluate how well you can reach the controls, handle the bike, and if the overall ergonomics suit your stature and riding comfort.