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James Gaskets Big Twin Primary Housing Gasket - Harley Big Twin
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.
Ensure a robust seal for your Harley-Davidson or Indian Motorcycle Big Twin with this James Gaskets primary housing gasket. This OEM-quality replacement is manufactured in the U.S.A. to prevent oil weeping from the primary case cover. It's an essential component for dependable performance.
Why riders pick this
- OEM-quality replacement for Big Twin primary housings
- U.S.-made construction ensures durability and reliability
- Seals primary case cover to prevent oil leaks
- Compatible with many Harley Big Twin V-twin models
A critical component for any Big Twin V-twin, this James Gaskets primary housing gasket offers an OEM-quality replacement solution for maintaining a leak-free primary drive. Crafted in the U.S.A., it's designed to seal the primary case cover effectively, protecting against oil loss and contamination. Riders who demand reliability from their Harley Touring, Softail, or Dyna models know the importance of a quality gasket for long-term performance.
Quality Sealing for Big Twin Primary Covers
- OEM-quality replacement gasket for Big Twin primary housings
- Made in the U.S.A. with high-grade gasket material
- Effectively seals the primary case cover and related assemblies
- Helps prevent oil weeping and contamination of your primary drive
Maintain Your Big Twin's Integrity
Whether you're performing routine maintenance or addressing a persistent leak, this James Gaskets primary housing gasket is engineered for a precise fit and lasting durability. It's designed to integrate seamlessly with your Big Twin engine, providing the secure seal needed to keep your primary system functioning correctly. This ensures your Harley-Davidson or Indian Motorcycle runs cleaner and more efficiently, allowing you to focus on the ride ahead.
Specifications
- Brand: James Gaskets
- Manufacturer Part #: 31433-84-A
- Length: 1.45 in
- Width: 4.1 in
- Height: 0.65 in
- Weight: 0.046 lbs
Common questions
What does this gasket specifically seal?
This primary housing gasket is designed to seal the primary case cover and can also relate to the rear brake assembly area on Big Twin V-twin motorcycles.
Is this gasket suitable for Sportster models?
No, this part is specifically for Big Twin primary housings. Sportster models use a different gasket, so you should verify the correct part number for your bike.
Are special tools required for installation?
No special tools are generally required for installing this gasket. Standard motorcycle maintenance tools should be sufficient.
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 | 681-4627 |
| WEIGHT | 0.05 lb |
Great product! Fast delivery!
Great design! No O ring to forget and good seal on base.
Great! No leaks.
I didn't think the base gaskets would be paper. Everything else was great
purfect