Red Line® 42904 - V-Twin Primary Case Oil

0 reviews|Item # mpn4641762095|Similar Products
OUT OF STOCK - Unavailable until further notice
Authorized Dealer
Have a Question? Ask a Specialist
888.903.4344Live Chat

Product Details

Universal V-Twin Primary Case Oil by Red Line®. Everyone thinks about the transmission side, but the clutch and primary chain need love, too. Full-synthetic formulations specific to the latest V-Twins, UTVs, ATVs and Sportbikes. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials using up-to-date equipment, it ensures everlasting reliability and enduring value. This product is distinguished by total quality assurance, unsurpassed by anybody else.


  • Suitable replacement for: API GL-4 / GL-3 / GL-1, SAE 75 / 80 / 75W80, SAE 30 / 5W30 / 10W30
  • For 1984-to-present V-Twin American motorcycle engines, including Evolution, Twin Cam and aftermarket engines of similar design
  • Same fluid as Red Line® famous MTL gear oil
  • Improves clutch operation while reducing wear and temperature
  • Where most synthetics are too slippery for clutch operation, this friction-balanced product is balanced to provide less slip, smoother operation and helps to apply more power in modified engines
  • This product is for use in the primary chaincase with wet-diaphragm spring clutches
  • Suitable Replacement For: API GL-4/GL-3/GL-1, SAE 75/80/75W80, SAE 30/5W30/10W30


Volume: 1 Quart
API Service Class: GL-4
SAE Viscosity Grade (Motor Oil): 5W30
SAE Viscosity Grade (Gear Oil): 75W80
Vis @ 100°C: 10.4
Vis @ 40°C: 54.1
Viscosity Index: 185
Pour Point, °C: -50
Pour Point, °F: -58
Brookfield Vis @ -40°C, P: 120


  • Full-synthetic formulations specific to the latest V-Twins, UTVs, ATVs and Sportbikes
  • Expertly crafted from the highest grade materials
  • Will deliver years of reliable service
  • Made to withstand the harshest conditions

In 1979, Red Line® began creating lubricants for the racing industry. Today, they manufacture more than 100 quality products, including motor oils, gear oils, assembly lubes, fuel additives and Red Line popular WaterWetter cooling additive for the automotive, motorcycle, marine and industrial markets.

Part Number:

Vehicle Fitment

This part is universal


Only authorized customers can leave a review on our website. We would love to know what you like or dislike about the product. Share your opinion on product quality, appearance, installation, and other characteristics.
Red Line® 42904 - V-Twin Primary Case Oil

Questions and Answers

If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!
All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only. It is neither inferred nor implied that any item sold by is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page.