Speedometer vs GPS...

[CIP57_imp]

This is the first bike I've owned where the speedometer is accurate. 70 mph on the CB speedo also reads 70 mph via GPS. 70 mph showed~ 4000 rpms on the tachometer. According to this gearing/speed calculator I've used for years...

http://www.cosportbikeclub.org/misc/SpeedCalc.html

My CB will do 70.2 mph at 3650 rpms. So my tach reads ~350 rpms fast. Not sure if this discrepancy will hold true at lower or higher speeds. I'll keep checking.

All the data needed for use of the calculator is in the manual.

The tach reads 500+ on top so 9000 is actually 8500