Hayden Primary Chain Tensioner - Big Twin Milwaukee-Eight
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 is an essential upgrade for any Big Twin V-twin, especially Milwaukee-Eight models. It automatically maintains optimal primary chain tension, adapting during both acceleration and deceleration. This intelligent system significantly reduces transmission clunk and delivers a noticeably smoother, quieter ride by eliminating the need for manual adjustments.
Why riders pick this
- Automatic tension adjustment for consistent performance
- Reduces transmission clunk and improves shifting
- Maintains optimal tension during acceleration and deceleration
- Eliminates the need for manual primary chain adjustments
Say goodbye to the annoying transmission clunk and enjoy a more refined ride with the Hayden primary chain tensioner for Big Twin Milwaukee-Eight engines. This innovative tensioner takes the guesswork out of primary chain maintenance by automatically adjusting tension. It’s designed to react to the dynamic forces within your primary, ensuring the chain is always at the correct tension whether you're rolling on the throttle or engine braking. The result is a more direct power transfer and a quieter, more enjoyable riding experience.
Smoother Shifts, Quieter Ride
- Automatically adjusts primary chain tension during all riding conditions
- Reduces harsh transmission clunk and noise
- Delivers a smoother, more consistent shifting feel
- Eliminates the need for manual primary chain adjustments
- Contributes to extended primary component life
A Must-Have for Performance-Minded Riders
For riders who demand the best from their Harley or Indian Big Twin, the Hayden primary chain tensioner is a crucial component. It’s particularly beneficial for Milwaukee-Eight owners looking to refine their drivetrain. By maintaining consistent tension, it not only improves ride quality but also helps to reduce wear on your primary chain and sprockets. This upgrade provides peace of mind and a tangible improvement in the overall feel of your motorcycle, making every ride more enjoyable.
Specifications
- Brand: Hayden
- Manufacturer Part #: M6BT17M8
- Length: 4.45 in
- Width: 7 in
- Height: 2.25 in
- Weight: 1.6 lbs
Common questions
Do I need to manually adjust primary chain tension after installing this?
No, the Hayden tensioner is fully automatic. It continuously maintains proper primary chain tension as you ride, eliminating the need for any manual adjustments.
Will this tensioner help reduce transmission noise on my bike?
Yes, by maintaining consistent and proper primary chain tension, this unit is specifically designed to reduce the clunking and clicking noises often associated with the transmission, especially during shifts and acceleration.
What Big Twin models is this primary chain tensioner compatible with?
This Hayden primary chain tensioner is designed for Big Twin Milwaukee-Eight engines, including a wide range of Harley-Davidson Touring and Softail models from 2017 onwards. Please verify fitment for your specific year and model using our Shop by Bike tool.
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 | 39-1208 |
| WEIGHT | 1.6 lb |
