Programmable Single Fire Electronic Ignition Module – 53-644
Fits S&S, Harley Evolution, Ultima, Revtech, Shovelhead & Evolution-Based Engines (1970–1999 Big Twin / 1971–2003 Sportster)
Replaces Dyna 2000 – PC Programmable – Single / Dual Fire Compatible

Product Description

This 2Ki Programmable Electronic Ignition Module is designed for S&S, Harley Evolution, Ultima, Revtech, Shovelhead, and any Evolution-based engine. It fits 1970–1999 Carb Big Twin Harley Models and 1971–2003 Sportster models (except 1200S). Will NOT fit EFI models.

The 2Ki extends many features of the best-selling Dyna 2000 module with a new design that fits under the cam cover. All features of the 2Ki switches are included.

*Note: 1982 and earlier models require a sensor cup (OEM #32402-83).*

Key Features

• Single Fire operation down to zero rpm for easier cranking and kicking

• Operates in all combinations of single fire or dual fire with single or dual plug heads (when used with appropriate coils)

• 8 advance curves to cover a broad range of engine builds and riding styles

• Engine over-rev protection adjustable from 6000 to 7500 rpm

• Adjustable timing retard for nitrous and turbo applications

• VOES indicator – shows VOES switch status and indicates when retard mode is active; aids in diagnosing faulty vacuum switches or retard controller operation

• Built-in Tach Driver – delivers stable tach signal during rev limiting; can activate shift lights, auto shifters, and other accessories

• Easy static timing with built-in timing indicator – no timing light required

• Intelligent over-current / short circuit protection – checks coil status at power-on; if error detected, unit switches off and flashes status indicator warning

• Active Dwell Control – adjusts coil current to maintain maximum spark energy to redline while eliminating coil stress from overcharging at idle

• High efficiency design – reduces battery draw for easier cold weather starting and lower charging system load

• Ruggedized output – cannot be damaged by broken or disconnected spark plug wires

• Over-voltage protected – against momentary spikes and surges from faulty regulators or battery boosters

• Premium harness construction – TXL cross-linked polyethylene wire with high-temp glass braid jacket; colors match factory harness for error-free installation

• Premium components – qualified for high temperature / high vibration environments

• One-piece aluminum housing – with thermally conductive epoxy encapsulation for superior heat dissipation and resistance to shock, vibration, and moisture

• Advanced microprocessor technology with Quartz crystal accuracy

• Intelligent over-voltage / over-current protection

• Adjustable retard timing

• Short circuit protection

Specifications

• Part Number: 53-644

• Type: Single Fire Programmable Electronic Ignition Module

• Fitment Type: Direct replacement for damaged or old Harley-Davidson ignition module

• Material: Metal – high performance, durable, reliable

• Installation: Easy to install – no installation instructions required

Compatibility

• Fits S&S, Harley Evolution, Ultima, Revtech, Shovelhead & any Evolution-based engine

• 1970–1999 Carb Big Twin Harley Models

• 1971–2003 Sportster models (except 1200S Sportster)

• Will NOT fit EFI models

*Note: 1982 & earlier models require a sensor cup (OEM# 32402-83).*

Data Recording Capabilities

• Total engine hours

• Time at wide open throttle

• Number of engine starts (two minutes running counts as one)

• Longest time operating at wide open throttle

• Maximum RPM

• Seconds near rev limit

• Statistical analysis of time at RPM

Package Includes

• 1 x Programmable Single Fire Electronic Ignition Module (53-644)