Harley-Davidson motorcycles do not use a Continuously Variable Transmission (CVT). Instead, they typically use a manual transmission or a traditional belt-driven final drive system, depending on the model. Therefore, there is no specific oil type recommended for a CVT transmission in Harley-Davidson motorcycles.
For the manual transmissions, Harley-Davidson recommends using a high-quality motorcycle-specific transmission lubricant. It is important to consult the owner's manual or contact an authorized Harley-Davidson dealer for the specific oil recommendation for your particular model and year, as there may be slight variations between different models.
It is generally recommended to use oils that meet the specifications provided by Harley-Davidson, such as those that meet the API (American Petroleum Institute) service classification of GL-5 or higher.
To ensure the best performance and longevity of your motorcycle, it is always advisable to follow the manufacturer's recommendations regarding oil type and change intervals.