The boats are driven by 2- or 3 cylinder two-stroke or racing engines. These have up to 350 cc.
The high performance engines do 120 hp at 13.500 rpm. They reach a top speed of 175 km/h.

The boats are driven by 2 cylinder two-stroke-racing engines. These have up to 250 cc.
The high performance engines do 95 hp at 13.500 rpm. They reach a top speed of 160 km/h.

The boats are driven by 1 cylinder two-stroke-racing engines. These have up to 125 cc. The engines do 50 hp at 13.000 rpm. They reach a top speed of 130 km/h.

OSY 400 stands for Original Serial Yamato with 400 cc. The Yamato engines do 33 hp at
6500 rpm. Top speed of this youngster class is 110 km/h.