Jerky jerky.....

[telboy]

Hi all,

I've just replace the speedo in my Cat after a disastrous day at worksop on sunday. The speedo I put in has worked fine until now.

I've wired it all up fine, but when I've just tested it on the street its jerky as hell. it doesn't move at all sometimes until I give it a push, then its just not smooth like it should be. I've tried a different sensor wire and it still does the same.

Any ideas?