I put Klotz R50 at 40:1 about half and half with my old stuff, leaning it out gradually- went though the old already, went through a whole tank of the 40:1 last weekend riding in the slop in the rain after I got my jetting and spark problems rectified. The klotz smells kinda racy, like when you go to the drag strip and someones got some "funny gas". The smell turns heads and doesnt hardly smoke at all when warmed up, i CAN TOTALLY DIG IT [img]i/expressions/face-icon-small-happy.gif[/img]