Its not very hard to tune the Nova's at all. As long as everything is mechanically correct (fuel system, clutch, gaskets etc.) They are pretty easy to get a tune on them after break in. My plus 4 is on its 7th gallon and I only adjust the tune hour here or there as needed for weather conditions. Knock on wood...it runs like a champ at 270* to 280* all day long with 10:30 + minute pit stops.