Dakota Digital SIM-1A Electronic Speedometer Adjustment Module

Dakota Digital SIM-1A Electronic Speedometer Adjustment Module

The Dakota Digital SIM-1A plugs directly between the transmission speed sensor and the factory speedometer or ECM to correct speedometer and odometer readings after a change in tire size, pulley ratio, or transmission gearing – a plug-and-play solution for most Harley-Davidson models that eliminates cutting or splicing.

Key Features

• Direct plug-in for most 1995-2006 Harley-Davidson Sportster, Softail, Dyna, and Touring models
• Uses factory Harley-Davidson connectors – no cutting or splicing required on compatible models
• Two push-button switches increase or decrease speedometer reading
• Adjustment range: 25% to 400% of original reading
• Corrects to within 1 MPH or KPH accuracy
• Fully sealed against water, dust, and dirt

Technical Specifications

• Adjustment Range: 25% to 400%
• Correction Accuracy: Within 1 MPH or KPH
• Connections: Factory Harley-Davidson connectors on compatible models
• Sealing: Fully sealed against water, dust, and dirt
• Direct Plug-In Models: 1995-2003 Sportster, 1996-2006 Softail, 1996-2005 Dyna, 2006 and earlier Touring with factory electronic speedometer

Fitment Notes

• Direct plug-in (no splicing) for 1995-2003 Sportster, 1996-2006 Softail, 1996-2005 Dyna, and 2006 and earlier Touring models with factory electronic speedometer
• Later models (2004-up Sportster, 2006-up Dyna, 2007-up Softail and Touring) require hardwiring into the stock harness
• On later models, correction is limited to Harley’s factory margin of error (typically 3-5%) – correcting beyond this may cause loss of 6th gear indicator and cruise control
• Review the fitment tab for the complete compatibility list