JAMES GASKETS SKU: 681-4635

James Gaskets Starter Shaft Primary Housing Gasket - Harley FLT & FXR Big Twin

$41.95
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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.

Ensure a reliable seal for your V-twin's primary case with this James Gaskets starter shaft primary housing gasket. Precision-made in the U.S.A., it's designed to seal the starter shaft opening on Harley-Davidson FLT and FXR Big Twin engines. This gasket offers a long-lasting solution to prevent oil leaks.

Why riders pick this

  • Seals starter shaft opening in primary housing
  • Made in the U.S.A. for reliable quality
  • Precision gasket material for a secure seal
  • Direct replacement for Harley Big Twin (FLT/FXR)

When you're working on your Big Twin, a quality gasket is essential for preventing leaks. This James Gaskets primary housing gasket is engineered with precision materials and production methods to provide a dependable seal around the starter shaft opening. Specifically designed for FLT and FXR V-twin platforms, it helps maintain the integrity of your primary case, keeping your ride clean and performing as it should.

Precision Sealing for Big Twin Primary Cases

  • Made in the U.S.A. with high-quality materials
  • Precision gasket material ensures a secure primary housing seal
  • Specifically fits Big Twin primary cases (FLT/FXR)
  • Designed to seal the starter shaft opening effectively

Installation for Optimal Performance

Proper installation of your primary housing gasket is critical for preventing oil leaks. This James Gaskets replacement is designed to meet OEM specifications, providing a direct fit. Before installation, thoroughly clean all mating surfaces to remove old gasket material and debris. Always consult your Harley-Davidson service manual for the correct torque specifications and procedures for reinstalling your primary cover to ensure a perfect, leak-free seal.

Specifications

  • Brand: James Gaskets
  • Manufacturer Part #: 12053-A
  • Length: 8.5 in
  • Width: 0.15 in
  • Height: 0.31 in
  • Weight: 0.1 lbs

Common questions

What does this gasket specifically seal?

This gasket seals the starter shaft opening in the primary housing on Big Twin V-twin engines to effectively prevent oil leaks from that area.

Will this fit my Sportster?

No, this gasket is specifically for Big Twin primary housings (FLT/FXR). Sportster models use different primary seals, so please confirm fitment for your bike.

Is this an OEM part?

James Gaskets manufactures this gasket to OEM specifications as a direct replacement for stock Harley primary housing gaskets, though it is an aftermarket part.

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.
BRANDJames Gaskets
TYPEGaskets/Seals
SKU681-4635
WEIGHT0.1 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
5
14 RATINGS
5★ 14
4★ 0
3★ 0
2★ 0
1★ 0
✓ VERIFIED
Oct 1, 2023

Excellent set

Excellent set for the price, easy to install, very durable products. I would recommend this set 10/10

— Eric S
✓ VERIFIED
Sep 11, 2023

Good quality

Breaking engine in right now and everything is holding tight. Very pleased

— Hawk R
✓ VERIFIED
Aug 28, 2023

Gasket set

Great gasket set, includes everything you need to reseal top end.

— James N
✓ VERIFIED
Jul 31, 2021

Quality parts in a timely manner

— Anonymous
✓ VERIFIED
Mar 29, 2021

Fit like it should, super quick shipping

— Anonymous
✓ VERIFIED
Mar 21, 2021

Gasket set seems to be of good quality. Everything fit just like oem gaskets and seals but made better lol. So far so good, Everything is nice a dry now.

— Anonymous