Chemicals & Fluids › Primary Oil Image 1 of 1 Primary Oil $11.49 Developed for use in all '84 and newer Big Twin Harley Davidson motorcycles equipped with a wet type diaphragm spring clutchBlended with extreme pressure additives for outstanding film strength, wear protection and durabilitySpecifically formulated for high performance primariesSold in quarts (12 per case) Quantity: Purchase Added! Developed for use in all '84 and newer Big Twin Harley Davidson motorcycles equipped with a wet type diaphragm spring clutchBlended with extreme pressure additives for outstanding film strength, wear protection and durabilitySpecifically formulated for high performance primariesSold in quarts (12 per case)