i just put a new yosh slip on on my 04 Z400 i put it on and fired up the quad and it makes a whistling sound at almost every rotation. i have never heard a pipe make a noise like this, is this just a sound that will go away after the pipe is broken or was i not carefull enough when i put it on and something got in side. any suggestions would help thanks

 

Dont know a lot about the yosh pipe, but did you re-jet and put filter kit on as well?? Once you get them to breathe out good you should get them breathing in good as well. Just asking.[img]i/expressions/face-icon-small-smile.gif[/img]

 

i havent re jetted the quad yet, have had a aftermarket filter in there for a while