Hayden Primary Chain Tensioner - Big Twins Harley Touring & Dyna
About Hayden
Hayden parts and accessories are stocked at Vtwinbikers for Harley-Davidson and Indian Motorcycle applications. Every Hayden item we list is new and sourced through authorized distribution. If you are not certain a part matches your year and model, use Shop by Bike or email our team before you order and we will confirm fitment first.
The Hayden Primary Chain Tensioner for Big Twins automatically maintains proper chain tension, eliminating slack that causes noise and harsh shifting. This upgrade provides a smoother, quieter ride by reducing transmission clunk during acceleration and deceleration. Experience a noticeable improvement in your V-twin's drivetrain performance.
Why riders pick this
- Automatic primary chain tension adjustment
- Reduces transmission clunk and drivetrain noise
- Smoother gear shifts and easier neutral engagement
- Extends life of primary components
- Enhances ride quality for Big Twin models
Factory primary chain tensioners can often lead to excessive slack, resulting in the dreaded 'primary clunk' and rougher shifts. The Hayden Primary Chain Tensioner is engineered to address these issues by continuously adjusting chain tension. This automatic adjustment ensures optimal tension across all RPMs, leading to a more refined and enjoyable riding experience.
Ride Quieter, Shift Smoother
- Automatically adjusts primary chain tension for optimal performance
- Significantly reduces transmission noise and primary clunk
- Promotes smoother and more precise gear shifts
- Minimizes wear and tear on primary drivetrain components
- Enhances overall ride quality by reducing drivetrain lash
Optimized Drivetrain Performance
Installing a Hayden Primary Chain Tensioner is a straightforward upgrade that yields significant benefits. By eliminating unnecessary primary chain slack, you're not only making your V-twin quieter but also extending the life of your compensator sprocket, clutch basket, and primary chain. This is a must-have for riders looking to uncork their Big Twin's true potential and enjoy a more refined ride on the open road.
Specifications
- Brand: Hayden
- Manufacturer Part #: M6-BT65
- Length: 4.45 in
- Width: 7 in
- Height: 2.25 in
- Weight: 2.1959 lbs
Common questions
Will this tensioner eliminate all noise from my primary?
While it significantly reduces clunking and rattling by maintaining consistent chain tension, some minimal mechanical noise is normal in V-twin primary drives. This tensioner focuses on minimizing slack-related sounds.
Is special tooling required for installation?
Installation typically requires basic hand tools and access to the primary cover. We recommend consulting your specific model's service manual for detailed instructions and torque specifications.
Does this fit all Harley-Davidson Big Twin models?
This Hayden Primary Chain Tensioner is designed for a wide range of Big Twin models, including many Harley-Davidson Touring and Dyna platforms. Please confirm fitment using our Shop by Bike tool before ordering.
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.
| BRAND | Hayden |
| TYPE | Drive |
| SKU | 39-1200 |
| WEIGHT | 2.2 lb |
