If you are stopped for a moving traffic violation while wearing a helmet and are above the age of 18:

In Utah, all motorcycle operators are encouraged to wear helmets, but those age 18 and older are not required to do so. To encourage helmet use, riders who are stopped for a moving traffic violation and who are above the age of 18 will have $8 of the fine waived if they were wearing a helmet at the time of the incident.
DMV Writen Test