Yamaha Raptor 660 ATV Motorcycle: The 660R Raptorٮ Just one look at this machine gets the heart pumping in overdrive. Could it be the aggressive, carnivorous scowl of its predatory, hawk-like bodywork? Or perhaps the fact that it's packing the biggest, hardest-hitting and highest-revving 660cc liquid-cooled, 5-valve sport ATV engine ever made? Or maybe it's the take-no-prisoners stance of its compact, super-light, 400cc-size chassis, race-bred suspension and a 5-speed, YZ-spec transmission? Actually, it's all of these things. And when taken as a whole, there's simply no sport ATV that can hold a candle to it. Anywhere.