What is yamaha xs 650 engine?

The Yamaha XS 650 was a twin-cylinder, four-stroke engine produced by Yamaha Motor Corporation from 1969 to 1985. The engine had a displacement of 653 cc and a maximum power output of 50 horsepower at 6,500 RPM. It featured a 360-degree crankshaft, which meant that the two pistons moved in unison, producing a smooth and balanced ride. The XS 650 was known for its durability and reliability, and was a popular choice for custom motorcycle builders. It also served as the basis for several racing bikes, including flat-track and road-racing machines. Some variations of the engine included electric start and a front disc brake. Overall, the Yamaha XS 650 engine played a significant role in the development of the motorcycle industry and remains a beloved classic among enthusiasts.