Grew the company into a healthy company called Nippon Gakki Co.. Ltd.
The bike was meticulously copied from the German DKW RT125 showstopper
The base was the single cylinder 125cc two-stroke
THE FIRST 250 cc TWIN. The example of the first twin Yamaha would be the German Adler.
YD1 a fairly modern motorcycle, stripped by the Yamaha technicians
YD2 was released in 1964 YDS3
The YDS 3 was actually the last copy that was still completely built according to the old Adler concept.
DS5 engine with high performance.
Parallel to the DS6 and heavy twin presented to the public in 1967, the R1.
Mean by the statement 54.54 (Yamaha would in all 250/350