will i have to rejet?

[monster300]

If i add a wb header to the silencer, will i have to rejet my carb? or will it be fine...

[400extracc]

i just installed a pro circuit pipe with air bax mods. i rejetted, 155 main jet stock pilot 1.5 turns air/fuel screw from closed and raised needle jet 1 notch. i will go to a 40 pilot i think, dealer did not have one in stock. hope this helps:macho

[ridered86]

yes