Speedometer accuracy?
#13
Here's a cut from the Wikipedia.
Vehicle manufacturers usually calibrate speedometers to read high by an amount equal to the average error, to ensure that their speedometers never indicate a lower speed than the actual speed of the vehicle, to ensure they are not liable for drivers violating speed limits.[
Vehicle manufacturers usually calibrate speedometers to read high by an amount equal to the average error, to ensure that their speedometers never indicate a lower speed than the actual speed of the vehicle, to ensure they are not liable for drivers violating speed limits.[
#15
#16
#19
Mine is off by about 1 @ 30, 2 @ 60, 3 @ 80, all to the positive.
Every bike I've ever owned (except for my '96 Road King, which had a certified speedo that was only 1% off at 100MPH) was off. Always to the positive, HD's from 3-5%, metrics up to around 10% @ 60MPH.
Never really minded it... Checked against GPS and the occasional bike-friendly LEO, re-check occasionally when I'm buzzing around just to make sure it stays consistent.
Every bike I've ever owned (except for my '96 Road King, which had a certified speedo that was only 1% off at 100MPH) was off. Always to the positive, HD's from 3-5%, metrics up to around 10% @ 60MPH.
Never really minded it... Checked against GPS and the occasional bike-friendly LEO, re-check occasionally when I'm buzzing around just to make sure it stays consistent.
#20
Left uncorrected motorcycle speedometers are a 5-10% off (showing u are going faster than you actually are). So the faster you go the more it is actually off. I hav owned a couple of bikes where they were really close, maybe even correct.
So if you do the math (using easy numbers of 10%):
10mph (indicated) actually equals 9mph,
100mph (indicated) actually equals 90mph.
Never bothered me so I have never corrected a speedometer.
So if you do the math (using easy numbers of 10%):
10mph (indicated) actually equals 9mph,
100mph (indicated) actually equals 90mph.
Never bothered me so I have never corrected a speedometer.