Helemt Use: Required by law under age 21, reflectorization required. NOTE: in conflict with state law the city of Myrtle Beach has passed a helmet ordinance requiring helmet use within city limits and place restrictions on motorcycle exhaust systems. Eye Protection: Required by law under age 21, unless equipped with windscreen Daytime use of headlight: Required by law-modulating headlight permitted Muffler: No acoustical criteria. Handelbar Height: No Restrictions Lane Spliting: he operator of a motorcycle shall not overtake and pass in the same lane occupied by the vehicle being overtaken. (c) No person shall operate a motorcycle between lanes of traffic, or between adjacent lines or rows of vehicles. More Motorcycle Laws