I have been reading different threads and I have throughly confused myself. I run a Grubee skyhawk angelfire with a cns carb. I had it running and idling good at 19:1 fuel ratio but spark plug(autolite 4123) was nasty oily and heavy carbon build up. I went to 32:1 same fouling idles really low or chokes out, but sounds and runs great at speed. I went to a ngk b6hs at same 32:1. It smokes like **** but the plug is brown/black and dry no carbon build up. However now it doesn't run nearly as fast as doesn't sound as good at speed and wont idle. I screwed idle in to get it to idle but it still sounds sick while at speed. My question is do I need to rejet the carb to get less fuel and go with a cooler plug or use the hotter plug and try to figure out the correct idle and air/fuel mix?