(1966 / Racing Machine)
This was a 2-stroke, 2-cylinder 125cc GP factory machine. Within the general trend toward multiple-cylinder engines at the time, it was developed with the 250cc engine of the RD56 as a base power unit in order to achieve the added performance that could not be attained with the single-cylinder RA41 and RA75 machines. It debuted at the Dutch GP in 1964 with Phil Read riding and placed 2nd. In the latter half of 1965, the RA97 evolved further and mounted Yamaha's first liquid-cooled engine, and won the company its first Isle of Man TT with Read riding. By 1966 its power had been boosted to 32PS and Bill Ivy rode it in a hot competition for the GP title.
- Engine type: Liquid-cooled, 2-stroke, in-line 2-cylinder, 124cm³
- Transmission: 8-speed
- Maximum power output: Over 23.5kW (32PS) / 14,000r/min
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