Just re-installed my a55 airsal kit with correct head gasket and after re-breaking it in slowly I'm now trying to get the correct jetting. Purchased a new NGK BR8HS plug, gap is around 3.25", current main jet is 76, idle 40 and 211 diffuser. The plug is pretty dark but not overly dark but I'm not seeing any carbon markings on the metal head casing? Does that mean it's too hot? Trail tech head temp was reading 275 F max. I'd rather it run a little rich right now until it's fully re-broken in.