It is generally not recommended to use an engine flush on a 2-stroke motorcycle, especially if you have not used it before or if the motorcycle is already at a high mileage like 17,000 kilometers. Engine flush products are primarily designed for 4-stroke engines and may not be compatible or necessary for 2-stroke engines.
2-stroke engines operate differently from 4-stroke engines, and they have their own specific requirements for lubrication and maintenance. Using an engine flush on a 2-stroke motorcycle could potentially cause damage to the engine or disrupt the delicate balance of oil and fuel mixture.
If you have concerns about the condition of your 2-stroke motorcycle's engine, it is best to consult the owner's manual or seek advice from a qualified mechanic or an authorized service center. They can provide guidance on the appropriate maintenance procedures and products that are specifically suited for your motorcycle's engine.