PC Racing Motominder Engine Hour Meter The correct schedule saves costly engine damage from service neglect, but Motominder can also save money from servicing too frequently. The smallest engine hour meter available (Approximately 1" x 1.5") it doesnt require additional mounting bracket and can be easily mounted by the peel and stick method to the frame or other convenient area. PC Racing is so confident that motominder is the most reliable engine hour meter available that it is backed by a 2-year manufacturer's replacement warranty.