New forum member here, let me know if this isn't allowed. Solved a problem from an old thread, and wanted to refresh, but didn't want to make a total duplicate post/thread.

I found a way to add miles to a used gauge on the bench for a LOT of touring models (and cruisers). Video attached to show functionality.

Scenario: You replace your speedometer with a used one, but the mileage on the new gauge is lower than true mileage. You have a bike that is not mileage exempt, and you want to make sure the odometer is accurate.

Solution: Use a $25 signal generator off of amazon. Put your bike on a battery charger, Disconnect the speed sensor, and connect the positive lead to the signal wire (white) at the speed sensor harness (female side), connect the negative lead to the ground wire (black) on the speed sensor harness (female side).

Set the signal generator to square wave, and set the frequency to 22,800 Hz (any higher and my gauge started resetting). Put your ignition to the "ON" and "Run" position. Start your signal generator. You will add mileage to your bike at around 900 mph. I was able to run the generator at 22,800, but no higher than that; photo shows one of my tests at 19,999 Hz

***This is not for mileage "rollback". You can only ADD miles with this method. This for for somebody who wants to make sure their bike has accurate mileage.

 

Welcome to the forum. Interesting concept. Me thinks, Most people would keep the lower mileage

 

I just installed a ThunderMax ecu in my 05 Springer. Already had a tune in it so I went through the process installing it and getting it running. I went for a short ride (about 4 miles) and noted that the dial would jump to 120. I figured there was some error and would check the codes when I got home.

I had just filled the tank the other day and I always reset the odometer. Well, I TRY to remember to reset the odometer.... This time I had, and it had only around 8 miles on it when I started. When I got home, I noted it had around 135 miles!

I took another smaller lap around and watched the odometer wheel around like a slot machine. Went into the program and adjusted the numbers to calibrate the speedo. T-Max allows you to change the calibration to adjust the speedo by changing a few settings. Not sure where those numbers came from, but that calibration was clickin' off miles. T-max has a lot of benefits, but I wouldn't suggest buying one just to add miles to your bike! LoL....

 

There is another thread that goes with this. Maybe he could paste the link.

I found it quite the bizzariare situtation to be in.



You might have more ***** then me. I would be worried I would screw up and end up with another 200k miles rather than 200. This seems to be a great solution. There is no way I am adding two hundred miles mechanically, unless the I really need the money at that minute and can't take any chances.

I understood the rigidness of the dealer wanting paperwork to match. I might have tried talking to them and redoing it.

Either way, interesting.

 

I agree. I think most would want to show lower mileage, but in states where the DMV tracks mileage, the minute the mileage is less than the last registration, you're bike is flagged for unknown mileage, and carfax will annotate that. This alleviates this issue. Plus, new programmable units from Dakota Digital are as much as $1600.00. A new set of harley CVO gauges cost almost $900.

You can get them used at a great price, and keep your mileage accurate with this method. To me, if I sold my bike and disclosed that the mileage is a lot higher than shown on the gauge, that's all well and good, but that does nothing if the next guy tries to flip it and claims it is the actual mileage. Keeps the honest man honest.

 

It would be super difficult to mess that up. This method adds 1 mile every 3-4 seconds. I'm averaging close to 1000 mph. It would take about 12 minutes to add 200 miles.

My odometer needed about 36,000 miles added. That's about 36 hours on the machine. I literally let it run over night. It's like smoking a brisket....

 

This will work on models prior to mileage being stored on the ECU. At least on digital odometers prior to 2008-2009 ish (maybe later years, but I cannot vouch for that)

 

Thanks for all the Info on this thread. Does this method work on latest models like 2023 Sportster S as well. It has Digital Cluster?
California has some weird laws of registering a Out of State bike with minimum 7500 miles on it. Mine had only 1700. So i would like to increase my mileage without riding it.
I plan to keep the bike, so I dont care about adding miles to it. Any help is appreciated. Please help me out.

 

Hey Sir,

I believe on the new models the mileage is stored in the PCM, so when you buy new gauges, you have to mate/pair them to synch them up. I believe this has to be done by a dealer, and you can only synch the mileage on brand new gauges to match your bike.

I could be wrong about that. I seem to recall running across that info when I was figuring this out.

 

Thanks for Reply. But Running a Signal Generator wont add mileage to PCM as well? Is it just to the Guage? Can you think of any other way of bumping my mileage to 7500 just for registration purpose. Thanks in Advance.