I got an e mail message from someone asking about tach wiring. I misplaced who asked about it. mine did not come with factory tach? I need the same info for one with factory magnetic ign. there was some question wether mine should have come with it ( tach ) I only ordered 2 options. Big engine & 4 speed. cheap model. no backup lights. no mirrors. no nothing. Sorry I could not be more help.