






⚡ Unlock peak clutch performance with every ride!
Red Line 42904 V-Twin Primary Case Oil is a friction-balanced synthetic oil designed specifically for wet-diaphragm spring clutches in V-Twin engines from 1984 onward. It enhances clutch operation by reducing slip, wear, and operating temperature, ensuring longer clutch life and smoother power delivery across motorcycles, ATVs, UTVs, and sportbikes. Trusted since 1979, this 1-quart oil is a must-have for riders demanding superior performance and protection.






| Viscosity | 75W/80W/75W80 sae_grade |
| Brand | Red Line |
| Vehicle Service Type | Car |
| UPC | 083522429047 |
| Automotive Fit Type | Universal Fit |
| Global Trade Identification Number | 00083522429047 |
| Manufacturer | Red Line |
| Size | 1 Quart |
| Model | 42904 |
| Item Weight | 0.634 ounces |
| Product Dimensions | 3.9 x 4.9 x 9 inches |
| Item model number | 42904 |
| Is Discontinued By Manufacturer | No |
| Exterior | Painted |
| Manufacturer Part Number | 42904 |
| OEM Part Number | 42904 |
| Special Features | 1 Quart |
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