Harddrive 40,000V Single Fire Coil - Harley & Indian V-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.
The Harddrive 40,000V Single Fire Coil is engineered to deliver a strong, consistent spark to your V-twin engine. Designed for single-fire ignition systems, it offers a significant upgrade over stock coils, ensuring more efficient combustion and improved engine response.
Why riders pick this
- 40,000V output for strong, consistent spark
- Dual coil with single-fire ignition control
- 3 Ohm primary resistance for aftermarket compatibility
- Fits stock mounting brackets and covers
- Direct replacement for many V-twin applications
This Harddrive single-fire coil provides a robust 40,000V output, ensuring your plugs get the juice they need for a complete burn. Its dual-coil design is precisely controlled by single-fire ignition logic, making it a direct replacement for many V-twin applications that run aftermarket single-fire ignition systems.
Optimized Spark for Performance
- Delivers a powerful 40,000V output per coil
- Features a dual-coil design with single-fire control
- 3 Ohm primary resistance for aftermarket ignition compatibility
- Designed to fit stock mounting brackets and covers
- Direct replacement for most V-twin engines
Seamless Integration and Power
With its 3 Ohm primary resistance, this coil is a perfect match for most aftermarket single-fire ignition systems, eliminating the need for additional tuning or modifications. It's built to bolt directly into stock mounting brackets, making installation straightforward for Harley-Davidson and Indian Motorcycle riders looking to enhance their ignition system's performance and reliability.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 10-2002
- UPC: 191361439360
- Voltage Output: 40,000V
- Primary Resistance: 3 Ohm
- Dimensions: 5 in L x 3 in W x 4 in H
- Weight: 3 lbs
- Country of Origin: China
Common questions
Will this single-fire coil work with my aftermarket ignition system?
Yes, this Harddrive coil features 3 Ohm primary resistance, which is specifically designed to be compatible with most aftermarket single-fire ignition systems without requiring additional tuning.
Do I need to purchase new mounting brackets for this coil?
No, this coil is engineered to fit directly into stock-style mounting brackets, making for a straightforward installation process on most V-twin motorcycles.
What kind of performance improvement can I expect?
This 40,000V coil delivers a more powerful spark compared to many stock units, which can lead to more efficient combustion, improved starting, and better overall engine response, especially when paired with a compatible single-fire ignition.
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 | 820-60400 |
| WEIGHT | 3.0 lb |
