Seeking basic wiring explanation of speedo connector block

[Ruby Racing]

It's been said you get the error code of a faulty speedo drive by means of the rev counter needle jumping to 5,000rpm (I think it's 5,000rpm) and staying there. My theory is that previous folk who have installed aftermarket speedos have encountered this problem because they haven't maintained the connections I mentioned that run to the igniter box and the pick up coil. That's why I intend to try that to see if it prevents the rev counter warning.


Thanks for the extra info. I don't understand it, but when I come to wire my Koso up I'll run it by my tame Sparks!