I have ran amsoil dominator in many 2-smokes, TRX310R, Banshee(highly modified but the 310 was still faster), 600RMK(improved stock), MM700(improved stock) and in my current M8000(improved stock). Never an issue EVER. As for the exhaust valve cleaning, it needs to be done on every sled regardless of oil brand. The last time I cleaned mine I just needed to brake clean them and a little scrub with scotch brite.