A Cub on CPI's sounds like way too much for a trail rider. Stock cylinders can produce more than enough trail riding power!! Nothing wrong with stock ported cylinders with Pro Circuits, Fatties, T5's!
Those setups with stock carbs, ported reed cages, decked heads, shaved flywheels, advanced timing & K&N pods will make it a great trail banshee! Talk to slobanshee06 & have him set you up your riding style.