does any one know how many turns the fuel screws need to be set at i had to grind off the tab to adjust them,after i cleaned the carbs the motor idles fine and runs perfect out of the water but under a load it will not make the transition onto the main jet it just dies off.i took the carbs back apart to look at all of the tubes and the main jets float level all fine also ck the dash pot it pumps fuel to all of the carbs when accelerating,i was just thinking that maybe it is pulling air through the pilot screws ? i did ck all of the basics like t-belt and compression both o.k