It is generally not recommended to reuse an oil filter on any motorcycle, including the Harley-Davidson Sportster. Oil filters are designed to capture and remove contaminants from the oil as it circulates through the engine. Over time, these filters can become clogged with debris, reducing their effectiveness.
Most manufacturers, including Harley-Davidson, recommend replacing the oil filter with every oil change. This ensures that you have a clean and properly functioning filter to protect your engine and maintain its performance.
Reusing an oil filter may lead to reduced filtration efficiency, increased risk of debris entering the engine, and potentially accelerated wear and damage to engine components. It's always best to err on the side of caution and replace the oil filter as recommended by the manufacturer or during regular maintenance intervals.