HI Bobby I have the JL150-5 it´s a Single cylinder Engine not a Twin..i have had my bike for 5 months.the bike is very big like a 400cc bike with a 150cc Engine. top speed is around 65mph.I use may bike for work going around town..i get around 70mpg riding 30-40 mph. bike is from China. web address :http://www.kingringmotor.com/english/ryb.asp