i was doing some reading last nite after i made this thread and it sounds like my main jets are just too small.
fmf gnarly pipes with powercore2,cylinders bored .50mm, stock crank stock carbs boysen rad valves.
ive tryed 230 mains with the needles on the middle clip.after i did the clean up port on the intakes the mofo is snappy but like i said at times it wants to die thats even before i did the clean up job.
so it could only be jets too small or losing spark
guess i should mention im 15,000 ft above sea level