Generator Tach Drive

[Bored&Stroked]

Have never seen one, but that doesn't stop you from creating one. I would also research the drive ratio of the pulleys and whether or not you can get a 90 degree drive that will accurately create the right RPMs for whatever tach you're thinking of using. Mounting off the crank is obviously generating a different ratio than hooking up a tack to the smaller driven generator pulley.