NEW 53-660 Single Fire Programmable Ignition Kit Fit For Big Twin Evo 53-644

Single Fire Programmable Ignition Kit for Big Twin Evo

This single fire programmable ignition kit replaces the factory ignition module on 1970-1999 Big Twin Evo motorcycles, delivering fully adjustable timing curves and firing each cylinder independently for cleaner combustion. Interchangeable with OEM references 53-660 and 53-644.

Overview

This single fire programmable ignition kit is a direct-fit replacement module for 1970-1999 Big Twin Evo engines, replacing the stock ignition with tunable timing maps. The kit fires each cylinder on its own coil signal for smoother idle, better throttle response, and more consistent combustion. It suits riders and builders running modified cams, carbureted or EFI conversions, and anyone who wants ignition timing control on an Evo Big Twin.

Built For Performance

• Programmable timing curves let you dial in advance for stock or built engines
• Single fire operation drives each cylinder separately for cleaner fuel burn
• Direct replacement footprint for the factory module on 1970-1999 Big Twin Evo models
• Cross-references OEM part numbers 53-660 and 53-644 for easy match
• Solid-state construction resists vibration and heat on air-cooled V-twin engines
• Works with stock or aftermarket coils for flexible builds

Fits These Machines

• for Harley-Davidson Big Twin Evo 1970-1999 models
• for Big Twin Evo with single fire ignition coil setups
• for Big Twin Evo engines with OEM 53-660 or 53-644 ignition modules

On-The-Job Use

• Timing tuning on modified Evo Big Twin engines after cam or exhaust changes
• Replacing a failed factory ignition module on 1970-1999 Big Twin Evo bikes
• Custom builds running single fire coils for cleaner cylinder firing
• Performance tuning on carbureted or EFI-converted Big Twin Evo powerplants

Specs At A Glance

Good To Know

Q: Do I need a single fire coil to run this kit? A: Yes, this kit is built for single fire operation and should be paired with a compatible single fire coil for both cylinders to fire independently.

Q: Will this fit my 1995 Big Twin Evo? A: This kit is designed for 1970-1999 Big Twin Evo models, but fit can depend on the exact year, wiring, and ignition module connector, so verify your OEM part number matches 53-660 or 53-644.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.