Griff 500 bouncing rev counter

I bought a 1998 griff 500 a few weeks back and the rev counter seems to bounce a lot when changing gear, is this normal?

if not what do I need to check /change?

Thanks,

Rob

They were on the car when I bought it, and it seems very quick.

ideally don't want to reduce performance.

I can cope with the bouncing now I know it's not likely to be a major problem.

Thanks for all the information.

Which of these would be best ?

http://tvr-parts.com/tvr-parts/part-details/tvr-03...

Or

http://tvr-parts.com/tvr-parts/part-details/tvr-e0...

Or

http://tvr-parts.com/tvr-parts/part-details/tvr-03...