Motul Twin Primary & Chain Case Oil 10W-40 100% Synthetic Ester 1L Pack of 8

Motul Twin Primary & Chain Case Oil is a 100% synthetic ester high-performance motorcycle primary case lubricant engineered for V-Twin primary drives operating under high loads, elevated temperatures, and repeated shock loading.

It is designed for compatible Harley-Davidson Big Twin, Evolution, Twin Cam, Milwaukee-Eight, and similar V-Twin motorcycles, and is formulated for use with wet clutches to help maintain consistent clutch feel while reducing slippage and chatter.

The formulation uses an SAE 10W-40 viscosity grade and meets API SL and JASO MA2 performance standards.

This package includes eight 1-liter bottles, providing a total of 8 liters.

WHY THIS PRIMARY OIL:

The 100% synthetic Ester Technology formulation provides strong thermal stability and maintains a protective lubricant film during high operating temperatures and extreme mechanical loads.

Molecular polar bonding technology helps the lubricant adhere to metal surfaces, providing added protection for chains, bearings, gears, compensators, and other primary-drive components.

Strong extreme-pressure performance helps reduce wear caused by shock loading and repeated torque transfer.

JASO MA2 wet-clutch compatibility supports predictable clutch engagement, reduced chatter, and smooth power transfer.

Good low-temperature fluidity helps reduce drag during startup and promotes quicker lubrication when the motorcycle is cold.

Robust anti-foam and anti-corrosion properties help protect internal components during demanding service.

BEST FOR:

Harley-Davidson Big Twin motorcycles

Harley-Davidson Evolution engines

Harley-Davidson Twin Cam motorcycles

Harley-Davidson Milwaukee-Eight motorcycles

Similar V-Twin motorcycle primary drives

Primary chain cases with wet clutches

Motorcycle primary systems requiring SAE 10W-40

Applications requiring API SL

Applications requiring JASO MA2

High-load street and touring motorcycles

V-Twin motorcycles exposed to heat and shock loading

KEY SPECIFICATIONS:

VISCOSITY GRADE: SAE 10W-40

STANDARDS: API SL, JASO MA2

LUBRICANT TYPE: 100% Synthetic Ester Primary Case Oil

APPLICATION: Motorcycle Primary Chain Case / Wet Clutch

TECHNOLOGY: Ester Technology / Extreme-Pressure Formulation

COLOR: Amber

TYPICAL PROPERTIES: Density at 20°C: 0.851, Kinematic Viscosity at 40°C: 97.8 mm²/s, Kinematic Viscosity at 100°C: 15.1 mm²/s, Viscosity Index: 162, Pour Point: -33°C / -27°F, Flash Point: 244°C / 471°F

CLUTCH COMPATIBILITY: Wet Clutch

PERFORMANCE FEATURES: High thermal stability, extreme-pressure protection, reduced wear, consistent clutch feel, reduced clutch slippage and chatter, smooth operation, low-temperature fluidity, anti-foam protection, and anti-corrosion protection

BOTTLE SIZE: 1 Liter / Approximately 1.06 US Quarts Each

PACKAGE QUANTITY: 8 Bottles

TOTAL VOLUME: 8 Liters / Approximately 8.45 US Quarts / 2.11 US Gallons

FITMENT AND COMPATIBILITY NOTE:

This lubricant is designed for compatible Harley-Davidson Big Twin, Evolution, Twin Cam, Milwaukee-Eight, and similar V-Twin primary-drive systems.

Do not assume compatibility with every Harley-Davidson or V-Twin motorcycle. Verify the exact model, model year, primary-case lubricant requirement, clutch design, viscosity specification, and fluid capacity before use.

This product is intended primarily for the primary chain case and wet clutch system. Do not automatically substitute it for engine oil, dedicated transmission gear oil, or another drivetrain lubricant unless the motorcycle manufacturer specifically permits it.

IMPORTANT NOTES:

Follow the motorcycle manufacturer’s recommended primary-case service interval and fluid capacity.

Service intervals may need to be shortened for severe use, high temperatures, heavy loads, aggressive riding, or competition conditions.

A complete drain and refill is preferred when switching lubricants.

Always verify the current service manual before installation.

WHAT YOU RECEIVE:

8 x Motul Twin Primary & Chain Case Oil 10W-40 100% Synthetic Ester, 1 Liter Bottles

Total Quantity: 8 Liters