I have a 2003 KDX220 ( new ) i have put a few hours on the bike and love it. I ordered and received a Gnarly Woods pipe and PowerCore 2 silencer. The stock specs say it's a 145 main 42 jet 1173 with 3 position clip and 1.5 turns on air screw. FMF wants to see all the same spec but a possible 148 main. I haven't worked with carbs to much....is it hard to do or complicated? Or should i send it to the local kawi dealership?