I need some help my speedo is 4 mph fast my pulse is 2156. Do I add 4% to the number or reduce the number ?

 

WmIl Jamie at Fuelmoto ( That’s If ya brought the unit from them ) And he’ll help ya out.

Gotta ask though, 4mph Out. You change out the pully to a different size ?.

Wiz 🍻

 

Yes i installed a 32 t comp . I changed the ratios. So I could use CC and my indicator. But I just checked my speedo and was off 4 mph fast . I did buy my tuner thru FM. But I figured all ask here first

 

2156 x 1.03 = 2221 You have changed the ratio by 3% so it's 2156 x 103% =new vss
All credit to member LA Dog (sticky. softail section)
"4. Powervision or other tuner to edit the pulse per km entry for the new drive ratio. New overall drive ratio will be 3% taller, and the speedometer calibration will be 2232 pulse per km for the Breakout with 240 tire. For all other model bikes, just add the ratio percentage increase to your current value. For example, with the 68t rear pulley upgrade it is a 3% ratio increase. multiply your current VSS value by 1.03 and that is the new number. for a 70t rear pulley, 6.07% increase, multiply your VSS by 1.0607 to get the new number. fine tune with a gps as needed. lower VSS by 10 if speedo reads slightly too fast, add 10 to VSS if speedo reads slow. adjust in increments of 10 as needed and re-test."

 

I used 2269 on one bike and 2282 on the other. Both Ultra's got it to match my Garmin

 

So if i get this correct. I did a 32t comp install . My rear drive is still 68 t. With the 32t comp theres a 6% reduction. So should I use 2156× 1.0607= 2286.?

 

Ah! Didn't catch the comp install...thought you changed sprockets, My bad

 

From the Fuel Moto University knowledge base https://university.fuelmotousa.com/s...-power-vision/

Q) How do I adjust my speedometer?

A) Speedometer calibration (VSS) can be changed in WinPv under Gear>Speedometer Calibration or on the PV device using Quick Tune. Raising the VSS lowers the reported MPH on your speedo, lowering VSS raises the reported MPH. To correct your speedo, change the VSS by the % of determined speedo error.

 

Thanks to all I was able to adjust my speedo according to my GPS.