The speed on the indicator is not really accurate... 10km/h off is normal, thus more offset is possible.
At school we did a comparosion test with a V-strom 1000 on a dyno, brand new model (2 years ago though), it had an offset of 14km/h at 100km/h
,so 114km/h equaled 100km/h..
The only way to be completely sure and accurate is by using a GPS system. Or just assume you're 10km/h slower than what you're reading on the speedo.