The recommended interval for checking valve clearances on a Harley Davidson motorcycle can vary depending on the specific model and year. However, as a general guideline, it is typically recommended to check the valve clearances on a Harley Davidson every 10,000 to 15,000 miles (16,000 to 24,000 kilometers) or once a year, whichever comes first.
It's important to consult the owner's manual or service manual for the specific model of your Harley Davidson, as the manufacturer's recommendations may vary. Additionally, certain riding conditions or modifications to the engine may require more frequent valve clearance checks.
Regularly checking and adjusting the valve clearances ensures that the engine operates optimally and helps prevent potential issues such as decreased performance or valve damage. If you're unsure or want specific information for your Harley Davidson model, it's best to consult the manufacturer or a qualified technician.