Harley-Davidson Automatic Primary Chain Tension Adjuster

Harley-Davidson Automatic Primary Chain Tension Adjuster

40063-05B
$236.57
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This Screamin' Eagle Automatic Primary Chain Adjuster eliminates the need for manual chain tension adjustments at standard service intervals, ensuring continuous and consistent drivetrain operation. It serves as an Original Equipment replacement on select Dyna, Softail, and Touring models while offering an upgrade path for compatible powertrains.

Engineered for reliable durability, this assembly maintains optimal primary chain tension to reduce wear and deliver smoother performance. It includes all necessary mounting hardware for straightforward installation alongside required model-specific gaskets.

Key Features

Brand Harley-Davidson
Product Type Primary Chain Tension Adjuster
Product Line Screamin' Eagle Performance
Sold In Units Each
Fitment Fits '85-'06 Evolution 1340 (except '85-'88 Softail) and Twin Cam powertrain; Original Equipment on '06-'17 Dyna and '07-'17 Softail and Touring models
Adjustment Type Automatic

Highlights

  • Eliminates manual primary chain tension adjustments at standard service intervals
  • Original Equipment design for seamless fit and dependable performance
  • Includes all necessary installation hardware
  • 50-State U.S. EPA compliant

Sizing & fit

Fits '85-'06 Evolution 1340 powertrains (excluding '85-'88 Softail) and Twin Cam powertrains. Standard equipment on '06-'17 Dyna, as well as '07-'17 Softail and Touring models. Requires model-specific primary gasket and seals for installation.

Compatibility

Fits '85-'06 Evolution 1340 (except '85-'88 Softail) and Twin Cam powertrain. Requires separate purchase of model-specific primary gasket and seals.

Installation Instructions

Warranty

1 year limited warranty – See manufacturer website for full details

What's included

Chain tensioner and all necessary installation hardware

Downloads

Frequently asked questions

What models are compatible with this automatic primary chain adjuster?

This tensioner fits '85-'06 Evolution 1340 powertrains (except '85-'88 Softail) and Twin Cam models, and serves as Original Equipment on '06-'17 Dyna and '07-'17 Softail and Touring models.

What is included in the package?

The kit includes the automatic chain tensioner and all necessary installation hardware.

Are additional parts needed for installation?

Yes, model-specific primary gaskets and seals must be purchased separately.

Does this product come with a warranty?

It includes a 1-year limited warranty.