I just noticed the tach in my rally pack isn’t working. It shows the engine idling at 200 rpm, and won’t go over 1800 rpm. The LED engine speed display in my shift light works, and they share the same tach signal so it’s not a wiring issue.

I have seen the replacement circuit boards for the rally pack, are they any good?

Damn junk 50 year old parts!!! 😁

 

Check your connections.