Just outa curiosity has anyone who only mixes their gas at only what the manufacture specifies, ever seize their bottom end, or damage their crank bearings,just wondering, I've mixed my gas at usually 50:1 regardless of what bike it goes in, I've lost the crank bearings 1 time on 1 bike ever....and it was 36 degrees out, so jetting may have been a factor on that one. And by the way I run at the MX track as much as I run trail, so it's not just tight single track stuff. I've always believed the manufactures recommend a way fatter pre mix ratio than what's necessary to cover their asses, and Ive proved that to myself over the years with to a doubt.