⚡ 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 |
S**S
Harley Transmission runs smooth
My got to oil for my Harley. Quality you can count on.
G**E
Redline Chaincase Oil
Great Primary Chaincase Oil
B**N
Recommended
It’s redline. Works great. What else is there to say?
H**W
Redline products ROCK!
Redline lubricants excel in all motorsports. From the aftermarket 6 speed trans & factory wet clutch primary in my '96 Harley Davidson EVO Softail to the Tremec T-56 Magnum 6 speed and 8.8 Traclok rear in my '85 S10 Blazer I trust Redline products, you should too!
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!
T**N
Perfect
Great product and cheaper than in local stores. Quick delivery.
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
I**
Just what I wanted
Exactly what I thought
Trustpilot
1 month ago
1 day ago
