The rider Thrust with Monster engine is characterized by its particular power-to-weight ratio. It has a thrust of 70 kg with propeller to 125 cm. Its total weight including harness is 23 kg. The starter is manual. It doesn't have a centrifugal clutch.
The model S-4 Rider has a Simonini Mini 2 engine. This engine has been completely modified. It's very quiet and reliable. It comes equipped with a standard electric starter, its total weight with the harness is 26 kg.