The very first pre-production water-cooled Yamaha TYZ 250 to appear at the Scottish Six Days Trial was this one seen here in May 1992. It was ridden by Yamaha factory technician and test rider HIRO KAMURA. His aim was to test the bike to its’ limits and finish the event which he did in 144th position losing 517 marks. This bike was to effectively replace the, by now, ageing TY250R air-cooled mono-shock Yamaha trials machine, which had proved so popular during its production run from 1984 to 1992. Kamura returned to Japan and fed back useful information to his development colleagues which resulted in the new models launch in early 1993.

Kamura seen here on Creag Lundie in the 1992 Scottish Six Days on the prototype TYZ Yamaha.

Hiro Kamura on the TYZ riding the Ben Nevis sections in May 1992.

(All Photos copyright: Iain Lawrie, Kinlochleven)