1. On the left side of the engine: The engine number is stamped into the left side of the engine case, just above the oil filter. It is a 5-digit number that starts with the letter "E".
2. On the vehicle identification number (VIN) plate: The VIN plate is located on the frame of the motorcycle, near the steering head. The engine number is listed on the VIN plate as the eighth through twelfth characters of the VIN.