Quote Originally Posted by Memphis Raines View Post
That slogan was actually concocted by Harley Davidson cycle riders who opt to modify their stock pipes to straight ones to give it more personality other than the rumble of the engines.

It is ok to hear those pipes coming from a Harley but smaller engined bikes will have an irritating sound effect like the ones you hear from chainsaws
They are stock pipe from harleys and not modified. Those iritating sounds to your ears are two-stroke scooter engines with aftermarket pipes. But there are good aftermarket pipe for two stroke that is good to hear like those malossi's and pollini italian pipe for Beta and yamaha jog scooters. I have yamaha and aprillia scooter with malossi pipe and most of the bike's enthusiast loves the sound of it specially during high rpm's. My four stroke liquid cool bike has stock silent pipe.