Originally Posted by m.hony
Not all Harley's are loud. It's just that 99 out of hundred guys wants loud pipes. If it is left as it came from the factory the volume is street legal- not loud.
Street legal noise levels are still loud and obnoxious in an otherwise relatively quiet campground. Motorcycles manufactured before 1970, the noise limit is 92 dbA. Before 1973, 88 dbA. Before 1975, 86 dbA. Before 1986, 83 dbA. 1986 or newer, 80 dbA.
That makes even a post-1985 Harley almost loud enough for a person to require hearing protection (OSHA hearing protection requirement is 85 dbA). Pre-1975 Harleys definitely
require hearing protection. That's fine on the highway, when the noise of the motorcycle blends into other traffic. In a campground where people complain about a 65 dbA generator, it's too much.