I have installed a KnN filter and removed the baffle jets are 150 and 155 needle is on the 4th clip from the top. I took the lid off and of course it ran like crap. I rejetted it to 155 and 160 pulled the plug and it is black. Do I need to go down to a 157.5 and 160 or go 155 and 157.5 black is to rich right?Any help is greatly appreciated.