Harddrive Premium Primary Chain 86 Link Endless - Harley Touring
About Harddrive
Harddrive is the house performance and replacement line built for American V-twins, covering everything from engine hardware and electrical to controls, lighting and chassis parts. The range is aimed squarely at Harley-Davidson and Indian riders who want a direct-fit part without dealer pricing, and it spans decades of model years — from Evolution-era Softails to current Milwaukee-Eight baggers.
Replace your worn primary chain with a Harddrive Premium 86 Link Endless Primary Chain, engineered for Harley-Davidson Touring models. This double-row chain offers superior strength and reliability, ensuring consistent power transfer to the rear wheel. Made in Japan with premium-grade materials, it's designed to meet the demands of high-performance V-twin engines.
Why riders pick this
- Heavy-duty double-row construction
- Endless design for maximum strength and durability
- Premium-grade materials resist wear and stretch
- Direct replacement for Harley Touring OE# 40037-07
- Made in Japan for precision quality
When it comes to maintaining the heart of your Harley Touring, a robust primary chain is crucial. The Harddrive Premium 86 Link Endless Primary Chain is built to handle the torque and mileage that performance baggers accumulate. Its continuous-loop design eliminates the weaker master link found on some chains, providing a more secure and durable connection within your primary drive.
Engineered for Reliability
- Double-row chain construction for enhanced strength and longevity
- Endless design ensures maximum integrity without a master link
- Crafted from premium-grade materials for superior wear resistance
- Precision manufactured in Japan for consistent quality and fit
Smart Upgrade for Your Drivetrain
Installing an endless primary chain is a job best done right, often requiring the removal of the clutch basket for proper fitment. This Harddrive primary chain is a direct replacement for OE# 40037-07, making it an ideal choice for riders looking for a dependable upgrade or replacement during a primary service. Pair it with a fresh primary gasket and a proper tension adjustment for optimal performance.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 89478
- UPC: 191361228537
- Length: 7.05 in
- Width: 3.5 in
- Height: 1.2 in
- Weight: 4 lbs
- Country of Origin: Japan
Common questions
What does 'endless' mean for a primary chain?
An endless primary chain is a continuous loop without a master link. This design offers increased strength and durability compared to chains with master links, but typically requires clutch basket removal for installation.
Is this primary chain a direct replacement for my Harley Touring model?
This Harddrive primary chain is a direct replacement for OE# 40037-07. Please confirm this part number matches your bike's original primary chain specification before ordering to ensure correct fitment.
What are the benefits of a double-row primary chain?
A double-row primary chain provides greater strength and load-bearing capacity than a single-row chain. This helps reduce stretch and wear over time, leading to a more reliable and longer-lasting primary drive.
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 | Harddrive |
| TYPE | Drive |
| SKU | 820-51173 |
| WEIGHT | 4.0 lb |
