The one AWK posted would probably be a way better for an atv because of the hour meter and the price. I run Outlaw Racing hour meters on all my mx bikes and I've never had any problems with them: Outlaw Racing HOUR METER . They have ones with a tach for $3 more but they only read to 8K. All of my bikes will run above that speed but but I don't think I'd dare look down when it's happening.