42904 V-Twin Primary Case Oil, for use with UTVs, ATVs and Sportbikes - 1 Quart

Great stuff I always use Red Line products in my 08 Dyna lowrider.

Great product that I've used for years

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.

It’s redline. Works great. What else is there to say?

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.

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.

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

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!