How do i hook up a VDO xtreme tach on a Arctic Cat Thundercat engine?

It is just the engine on a custom ATV drag frame, used on sand, in 100 yards it goes 3.9 seconds at 82 miles per hour|||If it's an automotive tach, you'll probably have to get a sensor that reads off the flwheel or crank pulley(most are connected to the ign. coil and have to be configured for 4, 6, or 8 cyl). I would contact VDO. Sounds like a fun ride.