Phatmoto 79cc, plus 3 other motorized bikes

The Phatmoto after 50 miles and 3 of my other motorized bikes. I was wrong about the gas being a half a gallon, its only a quart. Here in California the gas has ethanol in it and it is detrimental to small gas engines. Never leave ethanol gas in your motor for longer than a week, it turns stale quickly, corrodes the carb, and attracts water. You can use gas stabilizer, with so-so results, it best to use good gas always.