another tacho oddity

[andyoutandabout]

Spent time reading past tach problems like reading double, not reading at all and bouncing all over the place.
My new meter reads low. It kinda looks like it's suffering from power starvation. Does not bounce, sits pleasantly at tickover, picks up smoothly but slowly and reads something like 4,000 at 70 in top gear (about 1000 rpm less than it should with my 18/44 gearing according to the files gearing tables).
I'm all in bits at the moment so this is a really good time to have a solve.
I will clean contacts as recommended.
I've tested the grey wire for continuity and it's good.
I'll clean the grounds......
Anything else while she's in dry dock?

[Pat Conlon]

Andy me laddie, I suggest that you move this post down to the "FJ Running Problems" section.
You may get more of a response...

[andyoutandabout]

Think your right on the money farther Pat

[VMS]

What brand Tach is it? Alot of them are incompatible, but some of them can be recalibrated for a bike by the manufacturer

[andyoutandabout]

It's a standard ebay special. Which I guess means that's it's not so special - but it's way better than the one it replaced.