Stock diameter of a 75' KZ400S pipe

[kuhl]

Hey there, anyone know the stock diameter of a 75' KZ400S lower end of the pipe? I plan on cutting them right before where the stock muffler starts and buying a shorter muffler.

 

[firebane]

Give me a rough idea where you want to chop it and I'll go measure for you. But why not just take the muffler off and measure? I think they ar 1.5" OD

 

[danker16]

1.5 OD on my 83 440, you will have to change your jets, pilots and main for free flowing exhaust.