unburnt fuel

  1. lukecanna

    Black Sparkplug and Unburnt Fuel

    Hi forums, I am running 27:1 fuel mixture so 37ml of oil to 1 litre fuel. I use a short billet intake and I am experiencing alot of Unburnt fuel in my exhaust and I mean alot! As well as a black spark plug which I suppose the problem is the short intake. How do I solve this problem? Do I change...