I have purchased a cheap and cheerful tacho from SupaCheap (for the ignition set-up) but the accompanying instructions are a bit vague when it comes to finding an RPM signal. (I haven’t fitted a tacho in 40+ years!)
It says “Tachometers can be wired through various sources – coil or RPM signal wire.” Unfortunately, they don’t say what coil terminals to use. The Hall sender would probably be the best source of signal but I will have to try to find which is the signal wire.
Does anyone have experience more recent than my 40/50 year old memories?