ALL BALLS SKU: 279-2105

All Balls Jackshaft Kit - 9 Tooth Large Gear — Harley-Davidson Electra Glide Sport, Electra Glide Classic, Electra Glide Ultra Classic (1989-1993)

$144.97
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All Balls jackshaft kit with 9-tooth large gear for V-twin motorcycles, designed to improve primary drive performance and reduce shaft binding. The relocated cushioning spring eliminates the need for an inner primary support bearing, simplifying installation.

Features

  • 9-tooth large gear configuration
  • Relocates cushioning spring to rear position
  • Eliminates inner primary support bearing requirement
  • Reduces shaft binding and improves torque delivery
  • Easier installation than stock jackshaft

Specifications

  • Brand: All Balls
  • Manufacturer Part #: 79-2105
  • UPC: 723980409662
  • Length: 5 in
  • Width: 7.9 in
  • Height: 1.5 in
  • Weight: 0.91 lbs
  • Country of Origin: China (Mainland)

Fitment

Fits V-twin motorcycles with compatible primary drive systems.

Frequently Asked Questions

Will this reduce shaft binding on my bike?

Yes — the 9-tooth gear configuration and relocated cushioning spring are engineered to reduce primary shaft binding and deliver more torque.

Do I need the inner primary support bearing with this kit?

No. The relocated cushioning spring eliminates the need for the inner primary support bearing, which simplifies the installation process.

What's the main benefit of upgrading the jackshaft?

Better torque delivery to the primary drive, less shaft binding, and improved overall primary performance at a lower cost than major engine work.

Is this a direct bolt-on installation?

The design simplifies installation by removing the inner primary bearing requirement, but confirm fitment with your specific V-twin model before ordering.

BRANDAll Balls
TYPEElectrical
SKU279-2105
WEIGHT0.91 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.61
106 RATINGS
5★ 85
4★ 12
3★ 3
2★ 1
1★ 5
✓ VERIFIED
May 21, 2024

Only bearings I ever use. And I change them every time I change tires. Might be overkill but if you have ever had a wheel bearing go out at speed you would understand

— Dan E
✓ VERIFIED
Sep 4, 2023

No seals included as pictured

No seals included as pictured.

— Jason K
✓ VERIFIED
Apr 14, 2026

didn't install MADE In CHINA

— Bisio B
✓ VERIFIED
Aug 6, 2023

Missing Parts

This picture is what I ordered. What I got was only the bearings. So I had to get the seals at a dealership near me.

— Ken C
✓ VERIFIED
May 17, 2023

wheel bearings

easy install ,good quality and always delivers when you buy the All Balls products .Never an issue.

— CARLOS A
✓ VERIFIED
Aug 10, 2021

I don't know what is actually going on but I ordered this product and received only one bearing. I called and you sent me another bearing but in the book it shows 2 bearings in this kit. I did get the other bearing for nothing but the description for this item needs to be more clear.

— Anonymous