The KTM Duke 200 2017 model typically comes equipped with a 520 chain and sprocket setup. The standard stock configuration for the sprockets is a 14-tooth front sprocket and a 43-tooth rear sprocket. However, please note that variations in sprocket sizes may exist depending on the specific setup or modifications made to the motorcycle. It's always recommended to refer to the owner's manual or consult with a trusted motorcycle mechanic or authorized KTM dealer to ensure you obtain the correct sprocket sizes for your specific model.