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⚙️ Shift Smooth, Ride Loud—But Keep Your Transmission Quiet!
Bel-Ray Big Twin Transmission Oil is a premium synthetic 85W-140 multi-grade gear oil designed for heavily loaded 4-stroke V-Twin motorcycle transmissions. It delivers superior anti-wear protection, reduces gear noise and clunking, and ensures smooth shifting under high stress and acceleration. Trusted by riders for its proven performance and durability, it meets API GL-5 standards and is optimized for Big Twin air-cooled and liquid-cooled transmissions.
| ASIN | B005K60FJK |
| Best Sellers Rank | #7,567 in Automotive ( See Top 100 in Automotive ) #19 in Gear Oils |
| Brand | Bel-Ray |
| Brand Name | Bel-Ray |
| Container Type | Bottle |
| Customer Reviews | 4.8 out of 5 stars 738 Reviews |
| Included Components | Bel-Ray 96900-BT1 |
| Item Form | Oil |
| Item Type Name | Gear Oils |
| Item Weight | 2 Pounds |
| Liquid Volume | 1 Liters |
| Manufacturer | Bel-Ray |
| Material | Synthetic |
| Model Number | 96900-BT1 |
| Number of Items | 1 |
| Package Information | Bottle |
| Part Number | 840-1483 |
| Recommended Uses For Product | Transmission Oil |
| Specific Uses For Product | Motorcycle transmissions and final drives, Big Twin air-cooled/liquid-cooled transmissions and final drives, meeting API GL-5 standard |
| UPC | 690509401318 690509114225 |
| Unit Count | 33.814 Fluid Ounces |
| Upper Temperature Rating | 350 Degrees Fahrenheit |
| Viscosity | 85W 140 |
| Warranty Description | Manufacturer |
U**H
Great oil!
Amazing transmission oil. I am running this in my 2019 Harley M8 107. It's been awesome, it's running smoothly, I read from others that it made the transmission quiet down. I don't know of that's true, I'm only in like 750 miles, but here in a week or so I will do about 1500 miles, and I'll update things. So far, it's preformed better than the Harley oil I used last time. I'll continue to use this for my changes! I'm completely sold on it.
A**D
Works great.
Good oil, smooth shifting, good value for the money.
D**O
Harley oil
Good quality oil
M**N
Good oil!
Works great and a good price also!
J**L
Do it.
Smoother and quieter shifts... impressive.
J**.
Good
It’s good
J**F
It’s oil
It’s transmission oil, works fine.
J**R
Works Great
Decided to give this a second test and I must say I'm impressed with the shifting of my Harley seems to help overall.
J**Z
Calidad precio 👌👌👌
Gran calidad y buen precio
W**9
My favorite
Always use this on my 2009 FLHTC
R**W
Works
Price right and works as advertised
S**S
Fast
Good product
K**Y
Great oil
Great oil
Trustpilot
1 month ago
4 days ago