Lucas Primary Chain Case Oil - Chaincase OIL 1 QT (6/Case Sold Ea)

Lucas Primary Chain Case Oil is a mineral-based lubricant formulated specifically for V-twin motorcycle primary chain cases. It reduces clutch slippage, extends chain and sprocket life, and delivers cooler, quieter operation in high-performance applications.

Features

• Reduces clutch slippage for smoother engagement
• Extends primary chain and sprocket service life
• Delivers cooler and quieter chain operation
• Meets or exceeds all OEM specifications
• Formulated for heavy-duty V-twin engines

Specifications

• Brand: Lucas
• Manufacturer Part #: 10790
• UPC: 049807107901
• Size: 1 quart
• Weight: 1.99 lbs
• Dimensions: 2.45 in L × 4.35 in W × 9 in H

Fitment

Fits all V-twin motorcycle primary chain cases, including Harley-Davidson and Indian Motorcycle models.

Frequently Asked Questions

Is this the right oil for my primary chain case?

Yes, if you ride a V-twin Harley or Indian. Lucas Primary Chain Case Oil meets or exceeds all OEM specifications for primary lubrication.

How often should I change my primary oil?

Follow your motorcycle's service manual. Most Harley and Indian riders change primary oil every 5,000 miles or during major service intervals.

Will this reduce clutch slippage?

Yes — Lucas formulation reduces clutch slip compared to generic oils, delivering smoother engagement and less friction heat in the primary.

What size is one bottle?

One quart per bottle. Most Harley and Indian primary cases require between 1–2 quarts depending on model year.