Speedometer Calibrator

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Aug 3, 2025 | 10:43 PM

randallissimo

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Cruiser

Joined: Mar 2025

Posts: 244

Likes: 87

From: SWFL

Speedometer Calibrator

My speedo on my 1996 Dyna died so I put on a used one from a 2000 Sportster I had. Put on a new Deutsch 12 pin connector, making sure all the wiring matched up. Breadboarded a contraption on my bench to add 20K miles to the odometer so it matches what I had. Looks good, works good. Added the tach as well.

Now all I need is an in-line calibrator to make the speed correction. The Dakota SIM-1 looks great, small and super easy to use at about $150.

There is also another one sold under various names such as V-Factor and others. It is half the price, and assume does the same job.

Issue is, the SIM-1 looks weather tight, but the other one does not, at least not in the stock photos.

Any thoughts on this?

https://vtwin.parts/harley-davidson-...dometers-48640

https://www.dakotadigital.com/index....od/prd1011.htm

Aug 4, 2025 | 05:09 AM

GLFLSTCI02

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Joined: Apr 2010

Posts: 64

Likes: 70

From: Eastern Ontario

I have installed the SIM 1 on two bikes of mine so far, an 02 Heritage and just this past Friday on my 1995 Dyna, both bikes had modified final drives. Super easy to set up with a GPS and I have not had any problems with reliability. The SIM 1 looks weather tight enough for under the seat of the Dyna. Since you don't need to use it after the initial setup you could always tywrap a small parts bag over the contraller for extra protection.

Gene

Aug 4, 2025 | 01:12 PM