3m 49sLength

This is an old 2 stroke russian motor 350cc, 23hp, model "Neptun" Max Speed: 1 person 36 km/h; 2 persons 30 km/h; 3 persons 26 km/h. Motor need to be lowered by some 40mm, now on full throttle it starts cavitate. In this video throttle was approximately 75%.