Hi can any tell me if the yamaha YQ50 aerox is the same engine as fitted in the Yamaha jog . I know the Yamaha jog is a minarelli 1E40QMB air cooled . The reason I ask this is my jog has a 70cc head and piston kit and my piston has melted ,so new piston needed , can any one help cheers , as I can only find one for the Yamaha YQ50 model