what size jet are you running right now, and whats the average temp there?
with a vitos big bore you are only running a 300 or 310?? that dosent seem right i had a 300 in my stock bore engine with a modified lid and power pros exhaust.
its a 320 i just checked it. is that okay?
I just talked to vitos and he said that you should go up to a 350 or larger...fowling a plug is alot better than a top end rebuild...
I would get a 30mm or larger if i had your set up. Vito's sells jets for $2.95 a pop...order several...330-340-350-360-370...it depends,....
well i tested it today and its running a tad bit rich. i dont think that will hurt it tho. as long as its not lean?