ALL BALLS SKU: 279-2105

All Balls Jackshaft Kit 9-Tooth Large Gear - Harley Touring & Softail

$450.000,00
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About All Balls

All Balls Racing supplies wheel bearings, steering stem kits, fork seals, linkage rebuilds and shock components across the powersports market. On an older V-twin, a bearing and seal refresh is one of the cheapest ways to make a bike feel new again.

Replace your worn jackshaft with this All Balls kit, featuring a 9-tooth large gear designed to optimize primary drive performance. This upgrade is engineered to reduce shaft binding and deliver more usable torque to the rear wheel. It's a solid choice for riders looking to improve their bike's power delivery.

Why riders pick this

  • 9-tooth large gear configuration for improved primary drive
  • Relocated cushioning spring eliminates inner primary support bearing
  • Reduces shaft binding for smoother torque delivery
  • Designed for simpler installation than stock components
  • Enhances overall efficiency of your V-twin's drivetrain

This All Balls jackshaft kit is a direct replacement that brings modern engineering to your V-twin's primary drive. The 9-tooth large gear configuration is specifically chosen to improve the efficiency of your motorcycle's power transfer, ensuring that more of your engine's output makes it to the ground. If you're experiencing sluggish power delivery or want to ensure your primary drive is running at its best, this kit is a critical upgrade.

Optimized Primary Drive Performance

  • Engineered with a 9-tooth large gear for enhanced primary drive efficiency
  • Relocated cushioning spring design eliminates the need for an inner primary support bearing
  • Reduces shaft binding for smoother power transfer and increased torque delivery
  • Designed for easier installation compared to the factory jackshaft assembly

A Smart Upgrade for Your V-Twin

Upgrading your jackshaft is a smart move for any rider looking to maintain or improve their motorcycle's performance. The elimination of the inner primary support bearing not only simplifies installation but also reduces potential points of failure within the primary system. This kit is built for durability and reliable operation, making it an essential component for keeping your Harley running strong.

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)

Common questions

Will this jackshaft kit reduce shaft binding on my Harley?

Yes, the 9-tooth gear configuration and the relocated cushioning spring are specifically engineered to minimize primary shaft binding, which helps deliver more consistent torque.

Do I still need an inner primary support bearing with this kit?

No, the design of this All Balls kit, with its relocated cushioning spring, eliminates the requirement for an inner primary support bearing.

Is this jackshaft kit difficult to install?

Installation of this kit is designed to be simpler than the stock jackshaft setup, partly due to the elimination of the inner primary support bearing.

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.
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