Thanks, the pics of the plug are with the old gas and he was running Castrol 2T in it or at least that is what he told me.
It had a full tank when I got it so I was just running it on his mix and I never thought to ask how old the gas was? The new gas I mixed I used Motul 2T and 91 octane Super unleaded. With the new premix the plug did clean up a bit, but I ran it harder also since I was just by myself.
It seems like the mid range is where it is lazy and the throttle response is slow. I don't really know how to really explain it but it doesn't sound crisp & clean to me. In all fairness I guess I should admit, I am a pretty big guy at 260lbs, so I can imagine hauling my fat butt around in all that deep sand can't be easy.
So if I move the needle down a notch that will lean it out a bit until full throttle and could improve throttle response?