Harddrive 25T Transmission Sprocket - Harley Big Twin 6-Speed
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.
Maintain peak drivetrain performance on your Big Twin with the Harddrive 25-tooth transmission sprocket. This precision-machined unit offers a durable, direct OEM replacement for Harley-Davidson 6-speed models.
Why riders pick this
- 25-tooth count for Big Twin 6-speed
- Hardened steel construction for extended durability
- Precision-machined for accurate fitment
- Direct OEM replacement specification
- Reliable power transfer for your V-twin
When it's time to refresh your drivetrain, the Harddrive 25-tooth transmission sprocket provides a solid foundation. Engineered specifically for Harley-Davidson Big Twin 6-speed models, this sprocket is precision-machined from hardened steel to ensure exceptional durability and a long service life. It's designed to meet OEM replacement specifications, making installation straightforward and reliable.
Built for Reliable Drivetrain Performance
- 25-tooth count for Harley Big Twin 6-speed transmissions
- Precision-machined hardened steel teeth for maximum wear resistance
- Direct OEM replacement ensures perfect fitment and function
- Maintains factory chain alignment for smooth power delivery
Essential for Maintenance and Upgrades
Whether you're performing routine maintenance or building out a custom V-twin, this Harddrive transmission sprocket is a crucial component. Its robust construction is ideal for the demands of high-performance riding on Touring, Softail, and Dyna platforms. Consider pairing it with a fresh chain and new primary components to ensure your entire drivetrain is ready for the road ahead.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 191318
- UPC: 191361169304
- Teeth: 25
- Weight: 1.88 lbs
- Country of Origin: China (Taiwan)
Common questions
Will this sprocket fit my Harley-Davidson Big Twin?
This 25-tooth sprocket is designed for Harley-Davidson Big Twin models equipped with a 6-speed transmission, from 2006 to 2022. Always confirm fitment using our Shop by Bike tool.
Is this an OEM replacement part?
Yes, Harddrive manufactures this sprocket to direct OEM replacement specifications, ensuring it will fit and function just like the original part.
Can I use this sprocket with a wider rear tire?
While this specific sprocket is a direct OEM replacement, Harddrive does offer offset sprockets in a 1/2-inch offset that are designed to provide clearance for wider rear tires without modifying the primary or transmission.
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 | Sprockets |
| SKU | 820-54692 |
| WEIGHT | 1.88 lb |
