Harddrive Speed Sensor 74420-94 - Harley Big Twin & Sportster
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 your Harley's electronics receive accurate speed data with the Harddrive transmission-mounted OEM speed sensor. This sensor is a direct replacement for Sportster and Big Twin models, and it's also compatible with most aftermarket 5- and 6-speed transmissions, including Right Side Drive configurations. It's built to stock specifications for reliable performance.
Why riders pick this
- Transmission-mounted OEM design
- Works with stock and aftermarket 5/6-speed transmissions
- Right Side Drive transmission compatible
- Built to stock specifications
A functional speed sensor is vital for the correct operation of your Harley's speedometer, odometer, and anti-lock braking system. When this component fails, it can lead to inaccurate readings and compromised safety features. Harddrive offers this OEM-specification speed sensor as a reliable, direct-fit solution, restoring precision to your motorcycle's data systems and ensuring all related functions work as they should.
OEM Quality for Critical Data
- Transmission-mounted OEM design for accurate speed readings
- Works with stock and aftermarket 5- and 6-speed transmissions
- Compatible with Right Side Drive transmission configurations
- Built to stock specifications for dependable performance
Essential for Modern V-Twin Performance
Whether you're maintaining a classic Big Twin or a customized Sportster, a fully functioning speed sensor is non-negotiable for modern riding. This Harddrive sensor provides the accurate input needed for your bike's ECU and other electronic systems, contributing to overall performance and safety. Invest in quality and keep your V-twin's electronics running smoothly.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 720179
- UPC: 191361119156
- Weight: 0.2911 lbs
- Country of Origin: China (Taiwan)
Common questions
Is this Harddrive speed sensor compatible with aftermarket transmissions?
Yes, this sensor is designed to be compatible with most aftermarket 5- and 6-speed transmissions, including various Right Side Drive models. Always confirm compatibility with your specific aftermarket unit.
Is this an OEM Harley-Davidson part, or an aftermarket reproduction?
This is an OEM equipment speed sensor manufactured by Harddrive, built to meet or exceed stock specifications for Harley-Davidson and Indian Motorcycle V-twins.
What Harley-Davidson models does this speed sensor fit?
This sensor fits Harley-Davidson Sportster and Big Twin models with OEM transmission mounts. Please use our Shop by Bike tool to verify fitment for your specific year and model.
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 | Electrical |
| SKU | 820-52359 |
| WEIGHT | 0.29 lb |
