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Viper 640 Parts

Parts & Accessories for Viper 640 Sailboats

Viper Sailboat Parts & Accessories

West Coast Sailing is your source for Viper sailboat parts and accessories. The 505 has A powerful sail plan and easy-to-adjust rig that can be adjusted while racing ensures this challenging doublehanded trapeze dinghy performs superbly—from 30 knot smokers to light-air breezes. Designed in 1954 by Englishman John Westell, the 5o5’s sail plan and hull shape are strictly controlled, but rigging layout, spars, and the foils are more liberal, allowing the boat to be set up in a number of ways to suit racing preferences. Physically demanding in a breeze, most combined crew weights average around 340 lb.

Rigging Diagram

Use the diagram below to reference Harken part numbers to appropriate application on your Viper sailboat. Parts recommendations are offered as a guide for common applications.

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Gnav Strut

The Viper cockpit is very clean with a gnav in place of a traditional vang. The new 8:1 Harken gnav replaces the slider system with a captive bearing car designed for compression loads. The Harken IN8418 utility car removes most of the friction to make the system more powerful, reducing the need for a very high purchase, and making it far easier to use under load.

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Jib Halyard Fine-Tune

For cranking up the luff tension in fresh wind, the Viper's jib halyard is deflected through a 8:1 fine-tune. The double-ended system uses Micro Carbo Cams with X-Treme Angle fairleads, making it easy for the forward crew to adjust without leaving the rail.

Jib Leads

The 2:1 ratchet-controlled jib sheet runs through Carbo T2s on the clew to low-profile pinstop cars for trim angle adjustments. In addition to moving the cars forward to round the foot of the jib, Viper sailors can also improve light-air performance by removing the top batten to keep the leech open.

Diagram provided by Harken. West Coast Sailing is an approved seller of Harken sailboat hardware.