The Yamaha Raptor 660 is a 398 pound sport class all-terrain vehicle(ATV) manufactured by Yamaha Motors Inc from 2001 to 2005. The 660 Raptor includes a 36 horsepower 660cc, five valve, 4-stroke liquid cooled engine with the most displacement available in any quad at the time. It also featured a 3 intake and 2 exhaust valve setup, over 10.. Raptor 660 Top Speed. Powered by a 660cc single-cylinder engine with a power output of around 36 horsepower, the Raptor 660 top speed is between 72 and 75 mph. While that top speed range is specific to models still in fully stock form, the top speed of a Raptor 660 can be increased to 85 mph and beyond for those open to making some upgrades.
2005 Yamaha Raptor 660R Specifications Engine: Engine configuration Single-Cylinder How many cylinders 1 Types of power cycles Four-stroke Horsepower RPM 9000 Type of cooling system Liquid / Air Valves 5 Valves Per Cylinder 5 Valve types and configurations Single Overhead Camshaft Bore (millimeters/inches) 100 / 3.94 Stroke (millimeters/inches) 84 / 3.31 Engine displacement (cubic centimeters.. The Raptor 660 made me feel like I was sitting on top a tall farm quad. The 660 and 700 ( huge improvement over the 660 ) Raptors make me feel like I am sitting on a tractor rather than in a sports car like the 450's do. Just my humble opinion though. Link to comment Share on other sites.