Speedo Accuracy ( Or lack thereof)

[TURBO200R4]

mine was 10% off (looks like yours is the same) so if i was doing 40 i would add 10% 4 miles per hour if i was doing 90 i would ad 9 miles to it.
now that i am running the exmax i am only 5% off so i add half of what i use to add.
now that i am running the exmax my mileage is about 4 or 5 miles less every hundred miles.
i use a garmin gps to check mine

 

[1olbull]

mine was 10% off (looks like yours is the same) so if i was doing 40 i would add 10% 4 miles per hour if i was doing 90 i would ad 9 miles to it.
now that i am running the exmax i am only 5% off so i add half of what i use to add.
now that i am running the exmax my mileage is about 4 or 5 miles less every hundred miles.
i use a garmin gps to check mine

Interesting, Herman.
Adding the ExedraMax put mine dead-nuts on with my Garmin Zumo.
My odo remains off, but looses half of what yours does.
Perhaps Roadster versus Standard???

 

[TURBO200R4]

i know i think mine is the highest. it is a classic but i would not think that that would make a difference