Can't hold a tune up??
Does this mean you get it running well and soon after it does not run so well? How many miles in? Was the engine cold when you set the head torque and sufficiently warm when you set the carbs?
What is out of spec?
Most likely you have carb/ intake issues, like the others said. Maybe bad throttle shaft o-rings that effect the idle and transition charachteristics. Maybe diaphragms?
Have you checked to be sure the points are in good shape, gapped right and timing spot on?
Never underestimate the laxative properties of motorcycling.