z400mayhem
05-20-2010, 05:29 PM
Hey guys, I have a 2006 LTZ 400, with k&n, full yoshi.. I just jetted it, with FMF kit, i put in a 160 main, and the needle is on 3.5, its not running good, its bogging, my airbox just has 15 1/2" holes in it to let some extra air in, took the plug out and its black, whats wrong? What should i do? Was hoping to get out for the long weekend, but not looking like i will :(