sounds like it is to rich, first make sure filters are clean. I would replace spark plug caps before stator. usually wires would effect one side or other. do both plugs foul or just one side?? if one side try switching wires around and see if any change, if so then might need to repace coil if new caps don't do the trick. Depending what throatle opening your fouling at you may need to check the needle jets or try dropping the needle one or two notches. That did the trick for me after a new top end. It ran perfect before then redid the top end and kept fouling around 3/4 throatle.. I would not go to hotter plug, especiallly at pismo, you may overheat before you know what happened. 8's are as hot as you should go. A weal spark could be the problem but I would try everything else before stator or cdi. good luck and keep us posted
Ray