TOPIC:

Do anyone have a quick fix for spedometer needle jumping eractically after 100 KM/60MPH. Example, when driving at 110, the needle is jumping between 100 and 115 KM per hour. Thank You!

Has the speedo cable been pulled,cleaned,re-lubed(with a light grease)and re-installed?

After cleaning look for broken strands of wire on the inner cable as these might be giving the speedo a spurious signal.

As far as I know, It has not been cleaned. But I forgot to mention that it is an electronic speedo on a 1982 KZ 1000 Ltd.

Hi 1982ltd,
I moved this thread to the appropriate forum. If you look in the electrical section you will find your thread.

ELECTRICAL
Battery, charging system, ignition system, electrical starter system, ignition switch, lights, turn signal circuit, horn, gages, speedometer, tachometer, etc.
Good luck with your speedometer.

Broken or almost broken wire, loose solder connection,possible circuit board problem. All point to opening up the speedo/tach instruments and take look inside.