WELCOME TO THE
VIPER 640 CLASS ASSOCIATION
The Viper 640 is a high-performance one-design sport boat.
At 21 ft (6.40 m) and only 749 lb (340 kg) it combines the stiffness of a keelboat with the acceleration and planing abilities of a dinghy. The Viper has a precise and exhilarating feel on the helm, a spacious cockpit for three people, strict one-design class rules and ease of launching by ramp or hoist. More about the boat »