✓ VERIFIED
Jan 26, 2023
Quick delivery right gasket s
JAMES GASKETS
SKU: 681-4620
James Gaskets Big Twin Primary Housing Gasket Quad Seal Derby - Harley Softail & Dyna
$121.000,00
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About James Gaskets
James Gaskets has supplied American V-twin gaskets, seals and O-rings for decades and is one of the most widely stocked names for Harley-Davidson engine, primary and transmission rebuilds. When a service manual calls for a specific gasket, James almost always has an exact-fit answer.
Upgrade your primary seal with this James Gaskets Big Twin primary housing gasket featuring a quad seal derby design. Engineered in the U.S.A., it's built to prevent oil leakage on your Harley-Davidson or Indian Motorcycle V-twin.
Why riders pick this
- Quad seal derby design for superior oil retention
- Made in the U.S.A. with advanced materials
- OEM-grade replacement for reliable performance
- Prevents oil leakage from the primary cover
- Fits Harley and Indian Big Twin V-twins
Eliminate frustrating primary leaks with this advanced James Gaskets primary housing gasket. Featuring a robust quad seal derby design, this gasket provides superior oil retention compared to standard seals. Manufactured in the U.S.A. with state-of-the-art materials, it ensures a tight and reliable seal for your Big Twin engine.
Superior Leak Protection
- Quad seal derby design for enhanced oil retention
- Made in the U.S.A. with high-quality gasket materials
- Engineered to OEM-grade specifications
- Prevents frustrating oil seepage from the primary cover
Designed for Performance and Durability
This gasket is a crucial upgrade for any rider looking to improve the long-term reliability of their primary. The quad seal design is particularly effective in preventing the common weeping often seen around the derby cover. It’s an ideal choice for Softail and Dyna owners seeking a more robust sealing solution for their Big Twin. Pair it with fresh primary fluid and enjoy a cleaner, more reliable ride.
Specifications
- Brand: James Gaskets
- Manufacturer Part #: 25416-84-X
- Length: 6.85 in
- Width: 10.05 in
- Height: 0.65 in
- Weight: 0.155 lbs
Common questions
What is the benefit of a quad seal design?
The quad seal design offers enhanced sealing capabilities compared to standard gaskets, providing better oil retention and significantly reducing the likelihood of primary oil weeping or leaks.
Is this gasket a direct replacement for my factory primary seal?
Yes, James Gaskets manufactures this to OEM specifications, making it a direct, high-quality replacement for the factory primary housing seal on compatible Big Twin models.
Will this gasket fit my Softail or Dyna model?
Yes, this gasket is designed to fit Big Twin V-twins with quad seal derby primary covers, which are commonly found on Harley-Davidson Softail and Dyna models.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | James Gaskets |
| TYPE | Gaskets/Seals |
| SKU | 681-4620 |
| WEIGHT | 0.15 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.79
24 RATINGS
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✓ VERIFIED
Oct 14, 2021
Great product! Fast delivery!
✓ VERIFIED
Sep 10, 2021
Great design! No O ring to forget and good seal on base.
✓ VERIFIED
Feb 4, 2021
Great! No leaks.
✓ VERIFIED
Jun 9, 2020
I didn't think the base gaskets would be paper. Everything else was great
✓ VERIFIED
May 12, 2020
purfect
