[kolbbmw]

Noticed today on my 1983 CX650C that at around 70 mph, the rpm gauge needle fluctuates 500 rpm and the speed gauge needle fluctuates 4 mph while the engine and speed appear steady. Vibration is normal. Noticed this on backroads and on interstate. Motorcycle and engine have been operating perfectly.

Anyone ever seen this happen? I have not started troubleshooting it yet.

 

[JC]

Try lubricating the cables

 

[indygl500i]

my 1982 gl500 was doing that when I first got it I lubed the cables and it has been fine ever since.