The manufacturer’s stability rating and recommended paddler weight for our boats is shown below. 
K1 boat type Manufacturer’s stability rating Paddler weight
Cygnet >10 None specified
Tercel 10 <120kg
Cirrus 9 70-100kg
Lightning 8 20-60kg
Hobby 8 65-110kg
Viper 55 7 None specified
Viper 51 6 None specified
Tor 6 65-100kg
Raven 5-6 50-85kg
Lazer 3 None specified

 

K2 boat type Manufacturer’s stability rating Paddler weight
Rorqual 10 None specified
Mystere 8 <200kg
Viper 6 None specified
Mirage 5 <200kg