Hayden Primary Chain Tensioner - BIG Twins — Harley-Davidson Road King Special, Tri Glide Ultra Classic, Electra Glide Ultra Limited (2017-2023)

Hayden primary chain tensioner for Big Twin V-twin motorcycles, automatically maintains proper primary chain tension during acceleration and deceleration. Reduces transmission clunk and delivers a smoother, quieter ride without manual adjustment.

Features

• Automatic tension adjustment
• Maintains tension during acceleration and deceleration
• Reduces transmission noise and clunk
• Smoother shifting feel

Specifications

• Brand: Hayden
• Manufacturer Part #: M6BT17M8
• Length: 4.45 in
• Width: 7 in
• Height: 2.25 in
• Weight: 1.6 lbs

Fitment

Fits V-twin Big Twin motorcycles, including Harley-Davidson and Indian Motorcycle models.

Frequently Asked Questions

Do I need to manually adjust primary chain tension with this installed?

No — the Hayden tensioner automatically maintains proper tension as you accelerate and decelerate, eliminating manual adjustments.

Will this stop my transmission from clunking?

Yes. Proper primary chain tension reduces the clunk and click noise on downshifts and acceleration.

Is installation difficult?

Installation requires removing the primary cover and routing the tensioner into position. Most riders have this done at a shop, though experienced DIYers can complete it in an afternoon.

Does this fit Indian Motorcycles?

Yes — this tensioner is compatible with V-twin Big Twin platforms used in both Harley-Davidson and Indian motorcycles.

Will my bike ride smoother after installation?

Yes. Proper primary chain tension reduces vibration and noise, delivering a noticeably smoother feel during normal riding.