The cost of replacing a starter motor in a Harley-Davidson Street Glide motorcycle can vary depending on several factors, including the location, the specific model and year of the motorcycle, and where you choose to have the work done (e.g., dealership, independent mechanic). It's best to reach out to a Harley-Davidson dealership or a qualified mechanic to get an accurate estimate for the replacement cost. They will be able to provide you with the most up-to-date and specific information based on your location and motorcycle details.