carb ques

[xc400exracer01]

what is the stock main jet size on an 04,will a 160 no lid or baffle be noticeable will a dynojet from a400ex kit fit it
thanks

[Mobile Dyno]

Stock Mainjet on the 04' is a K134. The Dynojet will work. I would do the 144-146 dynojet main because just taking the baffle out doesn't flow like an aftermarket exhaust.

[STF]

its 135 and yes it will work but git a pipe and git a 155 jet,but takin the baffle dont help u the back pressure will decrease which means less power