Download YAMAHA OW60 SQUARE FOUR 500GP CHALLENGER: IT COULD HAVE BEEN THE 1982 WORLD CHAMPION (THE MOTORCYCLE FILES Book 21) - Alan Cathcart | PDF Online

This issue of The Motorcycle Files is centred upon a track test by Alan Cathcart of the only surviving example outside the factory of Yamaha’s ultra-rare rotary-valve square-four. This 500cc OW60 is the GP racer that was owned by French Yamaha importer Sonauto and on which Marc Fontan placed tenth in the 1982 World Championship standings. Despite Yamaha being massively