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Lucas Oil’s Primary Chaincase Oil is a premium motorcycle lubricant made for the primary chaincase of big twin motorcycle. This oil is formulated for high performing gear boxes and it causes smooth clutch action across all RPM's. It has superior oxidation protection and chatter resistant for long term performance and constant engagement. For extra protection from wear and durability, the oil is formulated using high pressure additives that offer temperature stability. This results in reduced friction and low drag for reduced slippage and increased clutch life. Expect a smooth clutch action, less slippage, longer chain and sprocket life and a much longer oil life. Chaincase Oil is a coolant for the clutch, not a lubricant. Get yours today, shipping is free.