I run the amz dominator at 32:1. Bought my bike used, didnt really know what condition the engine was in. I have added bolt ons for 4 years now. Most of the guys I ride with mix at 40:1 or 50:1. I am the only one that has not burnt down or seized yet I have always had good luck with the 32:1 mixture in other machines as well. Oil is cheeper than frequent rebuilds!!