My bike is blowing black smoke when I give the throttle a really good yank. And if I give it an even better yank, I can sometimes induce it to spit fire out of the exhaust.
It has an FP1413 chip, EVO air filter, and Arrow exhaust. I just replaced the spark plugs, cleaned/oiled the air filter, checked that TPS=0, checked that fuel pressure was at 44psi. And still no dice.
Any ideas on where to look next? I started playing around with the idle mixture settings, but initially these don't seem to have a large effect on the problem. All vaccuum hoses appear to be connected as well.