Speedometer Calibration

[mneblett]

Follow-up:

As the first step, I set the "displayed" speeds to be the same as the "measured" speeds, to see how much of a correction would result (i.e., measured 50 kph=displayed 50 kph; 100=100). With my current tire wear, inflation, etc., the displayed speed was actually *higher* that the actual (GPS) speed. That was great, as it meant that with a tweak or two I could get the displayed speed back down to the actual speed.

For today, I set the displayed speeds to be 50=52 and 100=104. Result: near perfect for my bike, being at or within 1/2 kph across the range.

Once again Alex, thank you for posting this!

 

[RPGR90s]

Rode my RT today with the speedo correction factors zeroed out. GPS showed actual speed to be 1-2 mph *higher* than bike's indicated speed. To me, that's great -- all I need to do now is tweak the corrections to zero-in on actual (GPS) speed.

Great news. Speedo error is my only small complaint on my new '24 RT. Think I'll be buying a new GS911 this fall.

 

[brownie]

If indeed actual speed exceeds the speedometer indicated speed that is exceedingly unusual. Usually actual speed is 3 to 5 mph less than the speedo is showing.

yep!!!! My ‘15 “R” is the FIRST German vehicle I have ever owned that was less than 1 mph off