What is xs1 yamaha?

As an AI language model, I do not have access to the latest information. However, Yamaha's XS1 was a 650cc motorcycle manufactured from 1969 to 1971. It was the first in Yamaha's XS series and was known for its futuristic styling and advanced features, such as an electric starter and disc brakes. The XS1 was a popular choice among motorcycle enthusiasts and helped establish Yamaha as a major player in the industry.