Dude you can blow the motor if its not jetted right, but its your bike so do what you want.

 

well the guy said 1 up so ill go 2 that would make it rich lik u said better rich then lean

 

he said to do that for the pipe, right? What about to make up for the header and the porting?

 

i told him about the header

 

i guess the porting is "fake" then, so just do what he says.

 

not sure if you have had some dealer jet your warrior yet but here are the facts
your stock main jet is a #145 put in a #150 main and make sure your idle mixture screw
is backed out 2 and 1/2 to 3 turns from gently seated dont change your pilot jet it'll be
fine where it is. its very easy to do the work yourself just remove carb and float bowl cover
and there is the main jet unscrew and install the new one the idle mixture is on the front side of carb
with a small straight type screw turn it in untill it seats and back it out 2.5 turns and test ride it.

its that simple