Common sense and well as Courtesy says keep the noise down in residential areas especially early morning, late night hours .. Seroiusly doubt my pipes are legal but are very easy on them until hit the open highway ..
Then when more biker are killed, they'll want a helmet law and bikes to have airbags, ect. And they'll say bikes aren't safe, that's the way the people we vote in to office think,:rr but every day they work we lose another Right or Freedom. JMO