Its 347 cubic centimeter twin-cylinder two-stroke engine made 39 horsepower ... Commons | Cropped and scaled | CC-BY SA 2.0] A few of Yamaha's most important 1970s models weren't meant to spend ...

Yamaha makes a surprising move with its air-cooled 249 cc V-twin engine in the layout. It's a long-stroke mill with a 49 ... the Royal Enfield produces 20.2 horsepower and 19.9 pound-feet of ...