Harddrive Crank Pin & Roller Assembly - Harley Big Twin
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.
Ensure proper crankshaft rotation and engine timing on your Harley Big Twin with this Harddrive crank pin and roller assembly. Designed as an OEM-replacement component, it helps maintain the integrity of your engine's bottom end. This assembly is a critical part for any engine rebuild or repair.
Why riders pick this
- OEM-replacement quality for Big Twin engines
- Ensures proper crankshaft rotation
- Maintains critical engine timing
- Pin and roller sold as a complete assembly
The crank pin and roller assembly are vital components in the heart of your Harley Big Twin engine, responsible for connecting the connecting rods to the crankshaft and allowing smooth rotation. This Harddrive unit is a genuine OEM-replacement component, built to meet factory specifications for 1981-1999 Big Twin V-twin engines. Replacing these parts with quality components is essential for reliable engine operation and longevity.
Precision Components for Your Big Twin
- Genuine Harddrive OEM-replacement component
- Maintains proper crankshaft rotation and engine timing
- Direct fit for 1981-1999 Big Twin engines
- Essential for engine rebuilds and bottom-end repairs
Restoring Bottom-End Integrity
Replacing the crank pin and roller assembly is a job that requires significant engine teardown and specialized tools. This Harddrive component provides the necessary precision to ensure your Big Twin's crankshaft functions correctly. It's a critical step in any comprehensive engine overhaul, helping to eliminate excessive play and restore the smooth, powerful operation you expect from your Harley-Davidson.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 39898
- UPC: 191361169786
- Length: 4.13 in
- Width: 1.37 in
- Height: 1.37 in
- Weight: 1.1353 lbs
- Country of Origin: China (Taiwan)
Common questions
Is this crank pin and roller assembly compatible with 2000-and-newer Big Twin engines?
No, this Harddrive crank pin and roller assembly is specifically designed for 1981-1999 Big Twin models. Newer engines, including Twin Cam and Milwaukee-Eight, utilize different crank pin assemblies.
Is this an OEM Harley-Davidson part?
This is a Harddrive brand OEM-replacement part. It is manufactured to meet or exceed the specifications of the original Harley-Davidson component for reliable fit and function.
Do I need to replace both the pin and the roller together?
Yes, the crank pin and roller are sold as a complete assembly and should always be replaced together to ensure proper fitment and function within the crankshaft.
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 | Engine |
| SKU | 820-58020 |
| WEIGHT | 1.14 lb |
