I'm 6'2 and 260lbs and I've had Yamaha, Shimano, Bafang and Fazua bikes. I have found them all to be adequate motors. I currently ride the Fazua bike and love it because its a BURLY build but only weighs 46lbs (which is 10lbs or 20% lighter than my full powered ebike). Riding by myself I have no problems and even riding with full powered guys I can keep up but I'm breathing heavy enough I can't hold a conversation (also I really only ride in river - "blue"- mode, if I turn to rocket -"purple/pink" I could keep up easily)...