Compufire Single Fire Ignition Coil 3 OHM - Harley Big Twin & Sportster
About Compufire
Compufire parts and accessories are stocked at Vtwinbikers for Harley-Davidson and Indian Motorcycle applications. Every Compufire item we list is new and sourced through authorized distribution. If you are not certain a part matches your year and model, use Shop by Bike or email our team before you order and we will confirm fitment first.
Maximize your carbureted Harley's spark delivery with the Compufire Single Fire Ignition Coil. Rated at 3 OHM and delivering a powerful 50,000 volts, this coil is engineered for optimal performance on Big Twin and Sportster models.
Why riders pick this
- 3 OHM resistance for single-fire systems
- 50,000-volt output for a powerful spark
- Direct replacement for single-fire setups
- Ideal for carbureted Big Twin and Sportster
- Made in the USA for quality
A strong, consistent spark is fundamental for performance, and this Compufire Single Fire Ignition Coil delivers exactly that. Designed as a direct replacement for single-fire ignition systems on carbureted Harley Big Twins and Sportsters, it ensures efficient combustion and improved throttle response. This coil is a crucial component for riders looking to get the most out of their V-twin engine.
Powerful and Reliable Spark Generation
- 3 OHM resistance for optimal single-fire ignition systems
- Delivers a robust 50,000-volt output for strong spark
- Designed for carbureted Harley Big Twin and Sportster models
- Made in the USA for quality and durability
Essential for Performance Ignition Systems
This Compufire ignition coil is an ideal upgrade or replacement for V-twin owners running a single-fire ignition. It's built to handle the demands of performance riding and provides a reliable spark for consistent engine operation. Ensure your ignition system is up to the task by pairing this coil with a compatible single-fire ignition module and quality spark plug wires.
Specifications
- Brand: Compufire
- Manufacturer Part #: 30640
- UPC: 694342547738
- Voltage Output: 50,000 volts
- Resistance: 3 OHM
- Length: 4 in
- Width: 3 in
- Height: 8 in
- Weight: 3 lbs
- Country of Origin: China (Mainland)
Common questions
Is this ignition coil compatible with fuel-injected Harley models?
No, this Compufire Single Fire Ignition Coil is specifically designed for carbureted Harley-Davidson models and is not compatible with EFI systems.
Can I use this coil with a points-style or Dyna S ignition?
No, this coil is intended for use with single-fire electronic ignition systems. It is not compatible with points-style ignitions or Dyna S systems.
What models does this ignition coil fit?
This coil fits 1970-1998 Harley-Davidson Big Twin models and 1972-2001 Sportster models that are equipped with single-fire ignition systems.
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 | Compufire |
| TYPE | Electrical |
| SKU | 139-10012 |
| WEIGHT | 3.0 lb |
