[Dlapratte]

i have a 98 zr 600 EFI, is it safe to put a homemade can or gut the muffler? Its EFI so it cant be jetted

 

[Dlapratte]

and if so whats the best way to make it louder using the stock can?

 

[RJ Gleason]

No, you can not modify the pipe without remapping the chip.