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🏍️ Ride smoother, last longer — Red Line’s clutch oil that means business.
Red Line 42904 V-Twin Primary Case Oil is a premium synthetic oil designed specifically for primary chaincases with wet-diaphragm spring clutches in V-Twin American motorcycles, ATVs, UTVs, and sportbikes from 1984 onward. Its friction-balanced formula enhances clutch operation by reducing slip, wear, and heat, extending clutch lifespan and boosting overall vehicle performance. Trusted since 1979, this 1-quart bottle delivers superior protection and smooth power transfer for serious riders.
| ASIN | B0053O9EUA |
| Best Sellers Rank | #5,068 in Automotive ( See Top 100 in Automotive ) #96 in Motor Oils |
| Brand | Red Line |
| Brand Name | Red Line |
| Compatible with Vehicle Type | Car |
| Container Type | Bottle |
| Customer Reviews | 4.8 out of 5 stars 2,699 Reviews |
| Flash Point | 232 Degrees Celsius |
| Global Trade Identification Number | 00083522429047 |
| Included Components | V-Twin Primary Case Oil |
| Item Type Name | Motor Oils |
| Item Weight | 1.7 Pounds |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Red Line |
| Manufacturer Part Number | 42904 |
| Package Information | Bottle |
| UPC | 083522429047 |
| Unit Count | 32.0 Fluid Ounces |
| Vehicle Service Type | Car |
| Viscosity | 75W/80W/75W80 sae_grade |
A**R
Best for wear and tear
This is by far the best primary oil I’ve used in my Harley. I’ve owned a few and have used redline for years.
D**K
Buy this you won’t regret it
Great stuff I always use Red Line products in my 08 Dyna lowrider.
J**.
Redline makes the best oil for Harleys that I have used.
This is some great oil, I use it in every thing on my bike. It was shipped very fast and packaged great. I have had no problems with this seller and will buy from again.
S**C
Slick!
Its red. Its liquid. Its slippery. Bike is happy.
G**G
It works
Seemed thinner than original but I works.
O**D
Pay for what you get
If you know you know only the best for my bike
G**!
Check the manual
I ordered the case first, it said it had everything WRONG! Harley Davidson is 38 oz not 1 quart. After changing all three fluids I noticed it wasn't enough primary oil. I had to order another quart for just 3 oz I had to wait another week until it finally came. Because Usps said they tried delivering it on Saturday and lied like usual. Saying they couldn't get up my driveway, which I don't have. So far Redline works great thanks. Remember 38oz
C**S
Nothing better
Redline all the time grate product only thing I run in both my bikes
Trustpilot
1 month ago
1 month ago