Selecting the correct chain depends on the motorcycle's displacement and usage. O-ring and X-ring chains are the industry standard for street and touring bikes because they feature internal lubrication seals that significantly extend service life. For racing or off-road applications where weight and friction reduction are critical, non-sealed chains are often preferred, though they require more frequent maintenance. Always match the chain pitch (e.g., 420, 520, 530) to the sprockets to ensure mechanical compatibility.