rev counter needle jumping about

[Dragon Dave 1]

I have just had a new head gasket fitted and now I have a problem with my rev counter jumping.

It operates as normal when the revs are below 4k. When I take the revs above 4k the needle starts to jump about. The speedo also starts to jump about when I get up to about 80 mph but the speedo only does it occasionally and the rev counter is all the time (if above 4k)

I have never had this problem before, it has only started to do this since the head gasket has been changed.

Has anyone else experienced a similar problem?

[Vladdn1 0]

I have, however my revcounter seems faithfully accompanies erratic revving at startup on wet spring mornings.

[VeeRsix 0]

lo m8

i cant see the head gasket change itself causing this malfunction since the rev counters electronic and not mechanical ,id be looking for a loose connection or nipped/frayed wire caused by the head displacement.

failing that you need to diagnose whats causing the surge in current/resistance which causes your clocks to bounce.

Stephen