Dodgy tacho ...

[LordGrover]

My rev counter appears to work fine ... until it doesn't. When I switch off, it stays where it is when the key was turned, typically c. 1,000 RPM
If I switch on the ignition again it returns to zero. Restart the engine and it runs as expected until the next stop.

[Barreti]

Isn't this because you've got the dials which start at the top LG (you've got a pre cat I believe)
Mine does something similar although I think it returns to 0 then sinks back to about 1000rpm
The speedo does something similar.

[LordGrover]

It is a pre-cat with the dials starting at the top, but this is a new issue - it has always returned to zero until Saturday.

[AntonyJ]

Hmm, pretty sure it is meant to do this.

Isnt it known as a tell-tale tacho.
In other words, race derivitive.

Lets the team know where the engine was being reved to when it went bang..

[LordGrover]

Not as far as I know ... a tell-tale tacho typically has a second needle that is pushed around by the first and sticks at the highest point.

[350Matt]

Does it matter?

Mine does this sometimes whizzing right round the dial and stopping pretty much anywhere.

I rather like it,

as long it reads absolutely fine when the engine is running then so what?

Matt

[K4000JB]

LordGrover said:

My rev counter appears to work fine ... until it doesn't. When I switch off, it stays where it is when the key was turned, typically c. 1,000 RPM
If I switch on the ignition again it returns to zero. Restart the engine and it runs as expected until the next stop.

hi this must be a common problem cos mine does it also just another querkiness of the griff we love