by dickie » Sat Jul 07, 2018 7:43 am
Tdr250 is a 2 stroke twin so will have two pulses per revolution, like varitronic. However it runs cdi and (probaby) has an independant tacho signal reducing it to one pulse per revolution.
It runs a dc based ignition sytem though, so the pulse shape and amplitude will be different.
Easy enough to hook up a 12v dc supply to and maybe the trigger pulse from your pick up will be able to fire the rev counter. If that doesn't work, try hooking it up to the low tension pulse. Don't try the ht pulse or you'll probably blow it.