Hey everyone, Have had my NSR for about a year now and have slowly been doing some upgrades to it and one was a Koso Digital gauge, problem is that its not picking up my tach reading and have tried to wire it different ways according to the Koso install sheet and have played with the different setting seems to semi pick up but never reads correct???? Help??? Ideas?

tried straight to old output wire, also already tried wrapping it the required 5 times. Some success with the wrap but not correct reading.

all old clusters and lights worked correctly

1989 NSR 250 with de-restricted wire splice
Koso GP STYLE SPEEDOMETER RX-2