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Hi guys,

I have a 1978 Honda cb250T and not sure where to put the lead for the RPM's into the tachometer.

I have read that wiring it to the ignition coil will fry the gauge and that it needs to go on the spark generator wire.

Not sure which colour that will be- heres the wiring diagram:
Wiring.jpg

any help appreciated :)
 

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Depends on the tachometer which should have come with instructions. Most I am familiar with connect to the coil primary wire. It needs to be compatible with your CDI ignition. It also need to be capable of recognizing one pulse (spark) as equating to one revolution (like a 2 cycle engine).
 
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