GAZ-V-21
08-20-2012, 11:05 AM
A few months ago i put a motoworks slip on and k&n filter with outerwear I jetted the carb to 152 and 42 and it was running great. I checked the plug every week and it looked good well a few weeks ago I was drag racing a buddy and my 400 just shut off then took a little while to start back up every since then it ran fine except the last couple times it seemed to run a little rougher. So yesterday I went to check the plug for first time in a while and it was very loose I pulled it out and it was super black I can't imagine I'm running rich what do you guys think? I just picked up a new plug what should I gap it at for a stock 400?