I was 21 and just got my NEW 68 Hodaka Ace 100 went up into the mountains above Boulder Colo. I was crossing a creek we had crossed in the summer for a picnic. I was about 20 feet away from the place we waded six inches deep I rode through the thin ice at the edge ended sitting in tank deep water . i pushed it out made a fire mostly dried myself then pulled the plug and air cleaner kicked the Two cycle engine about 50 times put the plug back in and it started! left the air cleaner off till I got home.