Just finished tinkering around and breaking in a 72 3 speed auto engine 6 volt CDI engine # 222250 I built years ago and socked away. I had it going 53 with a few more mph left. 40mph all day. This engine rips! Anyone looking for a strong engine to go in a K1 frame, I have a solid 88cc runner the will hang with a Lifan125! PM me for the details.