The Yamaha YG1 80 ccm rotary valve was one of the first machines that found worldwide recognition and fame.

It was sold in very large numbers, the first ones did not have the famous Autolube system. You can read on the technical specifications that a 20 : 1 mix was advised. The YG1 was introduced in 1963 and featured a ball-lock gearchange system. Oh! And its price was only $ 340,00 POE Los Angeles when introduced mid 1963 !!

Yamaha YG1 1964