Dakota Digital Electronic Speedometer Recalibration Module - SIM-1A For Harley Motorcycles 1995-2006 Brand_Tackform Due to the unstable nature

Due to the unstable nature of 4-valve engine design with one rocker arm activating two valve springs

2004-2019 Harley-Davidson Sportster 1200 Custom XL1200C 2004-2009 Harley-Davidson Sportster 1200 Roadster XL1200R 2004-2009 Harley-Davidson Sportster 883 Custom XL883C 2004-2009 Harley-Davidson Sportster XL883 2005-2010 Harley-Davidson Sportster 883 Low XL883L 2005-2007 Harley-Davidson Sportster 883 Roadster XL883R 2006-2011 Harley-Davidson Sportster 1200 Low XL1200L 2007 Harley-Davidson Sportster 1200 50 XL 2007-2012 Harley-Davidson Sportster 1200 Nightster XL1200N 2009-2021 Harley-Davidson Sportser Iron 883 XLN 2009-2012 Harley-Davidson Sportster 1200 X XR 2010-2012 Harley-Davidson Sportster 1200 XR 2010-2021 Harley-Davidson Sportster Forty-Eight XLX 2011-2017 Harley-Davidson 1200 XLCP 2011-2019 Harley-Davidson SuperLow XL883L 2012-2016 Harley-Davidson Sportster Seventy-Two XLV 2014-2017 Harley-Davidson SuperLow 1200T XL1200T 2016-2020 Harley-Davidson 1200 Roadster XLCX 2018-2021 Harley-Davidson Sportser Iron 1200 XLNS 2018-2019 Harley-Davidson Sportster Forty-Eight Special XLXS

but S&S CNC ported heads are recommended

2018-2021 Harley-Davidson Softail Slim FLSL 2018-2020

Dakota Digital Electronic Speedometer Recalibration Module - SIM-1A For Harley Motorcycles 1995-2006 Brand_Tackform Due to the unstable natureFeatures This module allows you to recalibrate OEM electronic speedometers when changing tire size, pulley, or final gearing Easy installation simply plugs in between the pickup sensor and the stock wiring harness Allows small step corrections of less than 1 mph Correction range of 50% to 200% No power required to maintain calibration when the bike is parked Two sealed buttons allow easy resetting of the speedometer reading while the bike is in motion