Brother, you bought an authentic Yamaha European car, which can't be wrong. Besides, there is no difference between a single-starter and a double-starter. In terms of Yamaha's quality, the start is foolproof. The only thing to worry about is that when the single-starter battery is dead, the electric start won't start, but it doesn't matter. Just slide on a slope and put it on, and it will start naturally. Or you can start the car by propping it up, putting it in third gear and pulling the rear wheel by hand.
I rode a Yamaha Tianjian cross-country version, which is the same SOHV engine as your European version, and its performance is very good.