kz1000p electric tachometer issue

The way I was thinking of measuring the accuracy of the tachometer is by going a certain speed that i know the rpms should be at in a certain gear with my sprocket gearing. Granted, you have to be moving for this to work. I've confirmed that my tachometer works and it reads noticably smoother but I haven't done any actual testing to make sure its functioning correctly because I had to take the transmission out of my car... Ill let you know how the tachometer works tomorrow.

Well, it didnt work. My tachometer is still inaccurate and bounces sometimes... maybe i should look at my ignition coils. I hope I dont have to tear apart my tachometer again.