Baker Drivetrain Launches Precision-Machined, Racetrack-Tested Line of Primary Chain Adjuster Shoes for Harley-Davidson Motorcycles
This is a press release from Baker Drivetrain…
Haslett, MI (February 23, 2026) – Baker Drivetrain, the industry leader in American-made motorcycle drivetrain products, announced the release of its new, high-performance race-grade primary-chain adjuster shoes for Harley-Davidson motorcycles. These components are engineered specifically for riders who demand maximum engine response from their high-performance Harley-Davidson.
Unlike stock adjuster shoes that are often molded, these new adjuster shoes are precision CNC-machined from billet Nylon 6-6. This superior manufacturing process ensures the shoes are stronger and more durable than OEM factory parts, making them ideal for demanding performance applications where reliability is non-negotiable.
These American-made components offer increased service life with reduced wear and are perfect for high output engines or vehicles that travel a substantial number of miles each year. The design has been rigorously tested and meets the highest standards of V-twin builders and race tuners.
“From quarter-mile passes to long-haul touring, we design and develop our products with performance and durability in mind,” said Bert Baker, co-founder of Baker Drivetrain. “We build parts with a purpose, and these adjuster shoes are the same. We tested them on the track, including on my own race bike, and the results were clear: they’re stronger, they last longer, and they do the job the way they’re supposed to.”
Engineered as a high-strength, low-friction wear surface, these shoes help control chain motion and reduce parasitic power loss, delivering efficient torque transfer from the engine to the transmission. This low-cost upgrade is essential for any rider looking for maximum efficiency and durability for their Harley-Davidson motorcycle.
Fitment Information
The Baker Drivetrain Race Grade Primary Adjuster Shoes are direct replacements for H-D part numbers 39976-65B (1965–2000 Big Twin models) and 39976-01 (2001–2006 Big Twin models, excluding the 2006 Dyna), these adjuster shoes offer a high-quality solution now that OEM production has ended. MSRP for both part numbers is $45.
VIDEO | The Baker Gearhead Garage – Race Grade Primary Chain Adjuster Shoes
For more information, visit www.bakerdrivetrain.com
