Tachometer jumps on and off

[[email protected]]

Hello all. Can't find a post like this, so here's the question. While revving steadily, my tachometer flings up to where it should be, then shuts all the way down, like there is an on-again, off-again connection.
Is this a mechanical link or an electronic pickup? Where should I start looking, please?

 

[FZ1riderNY]

Hello all. Can't find a post like this, so here's the question. While revving steadily, my tachometer flings up to where it should be, then shuts all the way down, like there is an on-again, off-again connection.
Is this a mechanical link or an electronic pickup? Where should I start looking, please?

What year bike is it and does it also effect the running of the bike or is it just reading up and down?

 

[va_rider]

is it jumping to 7k then back to zero? if so. that's the EXUP error...

also... drop me a PM if you want me to change your username to something other than your email address...

 

[[email protected]]

tach jumping

My FZ is a 2002. The engine runs perfectly, no hiccups at all when the tach needle is doing it's trampoline thing. If this were 1964 and it was a Chevy, I'd suspect the speedometer cable was pulling out of the socket, but geez, I don't want to appear as old as I am.