The 2006 Kawasaki Jet Ski STX 12F Personal Watercraft sports good looks and speed with the 1,199cc water-cooled engine which provides a Maximum Horsepower of 125. Pick from colors like Jet White/Candy and Thunder Blue. Some more specs for the Jet Ski STX 12F are an Overall Length: 122.8 in., Overall Width: 46.5 in., Overall Height: 41.3 in., Dry Weight: 737 lb., Load Capacity: 496 lb., Storage Capacity: 23.5 gal., and a Fuel Capacity of 16.4 gal. Take this Personal Watercraft home for a price of $7,999. Kawasaki Personal Watercraft.