VIPER 640 M-8 MAINSAIL
The M8 is an update to our tried and true M7 - the winningest Mainsail in class history with Multiple World and Continental Championships. With a proven shape that delivers unparalleled top end speed and a forgiving twist profile, the M8 is built from our proprietary North XI laminate cloth. The forgiving nature of this sail makes it easy to get up to speed and stay there!
World | North American | National
World | North American | National
- Full Battens
- Leech Battens
- Country Code
- Sail Numbers
- Trim Stripes
- Insignia
- Cunningham
- Visibility Window
- Roll Bag
- Mainsail Spreader Tip Patches
Dive into the North Sails Viper 640 Speed Guide—your essential companion for mastering speed, tactics, and winning strategies.
Dive into the North Sails Viper 640 Speed Guide—your essential companion for mastering speed, tactics, and winning strategies.
The North Sails Viper 640 Tuning Guide is a resource for class sailors aiming to optimize their performance on the racecourse. Packed with expert advice and detailed instructions, this guide covers rig setup, sail trim, and tuning techniques, helping you unlock your Viper's full potential.
The North Sails Viper 640 Tuning Guide is a resource for class sailors aiming to optimize their performance on the racecourse. Packed with expert advice and detailed instructions, this guide covers rig setup, sail trim, and tuning techniques, helping you unlock your Viper's full potential.
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North Sails wins more races than any other sailmaker because of their relentless commitment to innovation, technology, and performance. With a team of expert designers, engineers, and sailors, North Sails is constantly pushing the boundaries of what is possible in sailing.
North Sails wins more races than any other sailmaker because of their relentless commitment to innovation, technology, and performance. With a team of expert designers, engineers, and sailors, North Sails is constantly pushing the boundaries of what is possible in sailing.
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