HRC end cap. Do I need to rejet?

[bmphone]

I replaced the the stock endcap with the HRC unit. There are no airbox mods and EVERYTHING else is stock. Do I still need to rejet?

Thanks, Brian

[eastside 400]

no

[iceracer65]

i would the stock 118 main jet is way to lean stock....i friend of mine ran his on the dyno completely stock and jetting ended up at a 175!!! i would think around a 180 would be sweet!