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🏍️ Ride smoother, last longer — clutch oil that means business!
Red Line 42904 V-Twin Primary Case Oil is a friction-balanced synthetic oil designed specifically for wet-diaphragm spring clutches in V-Twin American motorcycles, ATVs, UTVs, and sportbikes. It reduces clutch slip, lowers operating temperature, and extends clutch life, ensuring superior performance and protection since 1979.
| ASIN | B0053O9EUA |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #19,082 in Automotive ( See Top 100 in Automotive ) #219 in Motor Oils |
| Brand | Red Line |
| Customer Reviews | 4.8 4.8 out of 5 stars (2,681) |
| Date First Available | January 30, 2010 |
| Exterior | Painted |
| Flash Point | 232 Degrees Celsius |
| Global Trade Identification Number | 00083522429047 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.7 pounds |
| Item model number | 42904 |
| Manufacturer | Red Line |
| Manufacturer Part Number | 42904 |
| Model | 42904 |
| OEM Part Number | 42904 |
| Product Dimensions | 3.9 x 4.9 x 9 inches |
| Size | 1 Quart |
| UPC | 083522429047 |
| Vehicle Service Type | Car |
| Viscosity | 75W/80W/75W80 sae_grade |
D**K
Buy this you won’t regret it
Great stuff I always use Red Line products in my 08 Dyna lowrider.
W**M
Good stuff
Great product that I've used for years
O**R
Excellent!
Red Line has been a trusted source of oils for many years. I have used it in all of my Harley Davidson touring bikes for decades. I change my fluids regularly and have never had an engine wear issue while using Red Line full synthetic. I highly recommend Red Line for V-Twin motorcycles.
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.
B**N
Recommended
It’s redline. Works great. What else is there to say?
K**I
The best for my Harley street glide
Red Line bottom line the best for my bikes and high performance vehicles. Removed Willie g derby cover and back to stock while servicing my primary fluid on my street glide. Also used in my 2022 fat boy.
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
E**N
Huge Upgrade - Much Smoother
Bought this to change my primary oil in a 08 FXDL. I was having trouble at times shifting into 1st especially when cold. Only had the bike for a couple months so figured the easiest "fix" to try first would be the oil change. What a huge difference!! Shifting into first is no longer a problem even when the engine is cold, smoother shifts throught and now I can easily find the elusive "N" on the first try!!!! Give Redline a try, hopefully you will have as great an experience as I did!
B**N
For 2011 FLHRC. Has made neutral easier to find.
B**G
Great oil for v twins highly recommend .
J**J
Best oil for Harley
M**S
Performed an oil change prior to a 4600 km road trip. This bike was new to me and therefore wanted my first trip with new oil. Went through some extreme temperatures on the trip and no issues to report. Good products.
B**1
Been using it in harley. Change it every coule years. Vety good product
Trustpilot
2 weeks ago
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