05 trailblazer 250,dg extreme pipe,k/n filter bumped up main jet by 2 but now bike stalls at idle and hard starting when warm have to use choke to start half way out??? any help or info would be greatly appreciated!!!

 

best to pull out the plug and take a look on how it looks. sounds like its running lean. did the dg pipe have a jetting recommendations. may need to adjust the air screw as well.

 

i'll look at the plug tomorrow,there was no info when i bought the pipe,the web site says generaly you go two sizes bigger for the pipe but it said nothing about the filter and for the air screw do you close it and bring it out one full turn?