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⚡ Ride smoother, shift stronger — the clutch oil your V-Twin deserves!
Red Line (42904) V-Twin Primary Case Oil is a full-synthetic, friction-balanced lubricant designed specifically for 1984 and newer American V-Twin motorcycle engines. Engineered to optimize clutch operation and protect the primary chaincase, it operates effectively across a wide temperature range with a high flash point of 232°C. Trusted since 1979 by racing enthusiasts, this oil reduces wear and heat while enhancing power delivery in both stock and modified engines.






| ASIN | B0053O9EUA |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | 193,053 in Automotive ( See Top 100 in Automotive ) 1,418 in Car Engine Oils |
| Brand Name | Red Line |
| Compatible with Vehicle Type | Motorcycle |
| Container Type | Bottle |
| Customer Reviews | 4.8 4.8 out of 5 stars (2,510) |
| Flash Point | 232 Degrees Celsius |
| Global Trade Identification Number | 00083522429047 |
| Included Components | Red Line (42904) V-Twin Primary Case Oil - Engine Oil (1 Quart Bottle) |
| Item Type Name | Motor Oils |
| Item Weight | 1.7 Pounds |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Red Line |
| Manufacturer Part Number | 42904 |
| Model Number | 42904 |
| Number of Packs | 1 |
| Part Interchange Info | 42904 |
| Size | 1 Quart |
| UPC | 083522429047 |
| Unit Count | 946.3529 millilitre |
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